Index: src/wp-content/themes/twentytwelve/css/blocks.css
===================================================================
--- src/wp-content/themes/twentytwelve/css/blocks.css	(nonexistent)
+++ src/wp-content/themes/twentytwelve/css/blocks.css	(working copy)
@@ -0,0 +1,387 @@
+/*
+Theme Name: Twenty Twelve
+Description: Used to style Gutenberg Blocks.
+*/
+
+/*--------------------------------------------------------------
+>>> TABLE OF CONTENTS:
+----------------------------------------------------------------
+1.0 General Block Styles
+2.0 Blocks - Common Blocks
+3.0 Blocks - Formatting
+4.0 Blocks - Layout Elements
+5.0 Blocks - Widgets
+6.0 Blocks - Colors
+--------------------------------------------------------------*/
+
+/*--------------------------------------------------------------
+1.0 General Block Styles
+--------------------------------------------------------------*/
+
+/* Captions */
+
+[class^="wp-block-"] figcaption {
+	color: #757575;
+	font-size: 12px;
+	font-size: 0.857142857rem;
+	line-height: 2;
+	font-style: italic;
+	text-align: left;
+}
+
+[class^="wp-block-"].alignleft,
+[class^="wp-block-"] .alignleft {
+	margin-right: 24px;
+}
+
+[class^="wp-block-"].alignright,
+[class^="wp-block-"] .alignright {
+	margin-left: 24px;
+}
+
+.rtl [class^="wp-block-"] figcaption {
+	text-align: right;
+}
+
+/*--------------------------------------------------------------
+2.0 Blocks - Common Blocks
+--------------------------------------------------------------*/
+
+/* Paragraph */
+
+p.has-drop-cap:not(:focus)::first-letter {
+	font-size: 5em;
+	margin-top: 0.1em;
+}
+
+/* Image */
+
+.wp-block-image figure:not(.aligncenter) {
+	line-height: 0;
+	margin: 0 1.714285714rem;
+}
+
+.wp-block-image figure.alignleft {
+	margin: 0.857142857rem 1.714285714rem 0.857142857rem 0;
+}
+
+.wp-block-image figure.alignright {
+	margin: 0.857142857rem 0 0.857142857rem 1.714285714rem;
+}
+
+.wp-block-image figcaption {
+	padding-top: 0.75em;
+}
+
+[class^="wp-block-"].alignleft,
+[class^="wp-block-"] .alignleft,
+[class^="wp-block-"].alignright,
+[class^="wp-block-"] .alignright {
+
+}
+
+/* Gallery */
+
+.wp-block-gallery {
+	margin-bottom: 24px;
+	margin-bottom: 1.714285714rem;
+}
+
+.wp-block-gallery .blocks-gallery-image figcaption,
+.wp-block-gallery .blocks-gallery-item figcaption {
+	left: 0;
+	right: 0;
+	text-align: center;
+	width: auto;
+}
+
+/* Quote */
+
+.wp-block-quote:not(.is-large):not(.is-style-large) {
+	border: 0;
+	padding: 1.714285714rem;
+	padding: 24px;
+}
+
+.wp-block-quote {
+	padding: 1.714285714rem;
+	padding: 24px;
+}
+
+.wp-block-quote cite {
+	color: inherit;
+	font-size: inherit;
+	font-style: italic;
+}
+
+.wp-block-quote.is-large p,
+.wp-block-quote.is-style-large p {
+	font-size: 20px;
+}
+
+/* Audio */
+
+.wp-block-audio audio {
+	display: block;
+	margin-bottom: 1.714285714rem;
+	width: 100%;
+}
+
+/* Cover Image */
+
+.wp-block-cover-image.aligncenter {
+	display: flex;
+}
+
+/* File */
+
+.wp-block-file .wp-block-file__button {
+	background-color: #e6e6e6;
+	background-repeat: repeat-x;
+	background-image: -moz-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: -ms-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: -webkit-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: -o-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: linear-gradient(top, #f4f4f4, #e6e6e6);
+	border: 1px solid #d2d2d2;
+	border-radius: 3px;
+	box-shadow: 0 1px 2px rgba(64, 64, 64, 0.1);
+	color: #7c7c7c;
+	font-family: inherit;
+	font-size: 11px;
+	font-size: 0.785714286rem;
+	font-weight: normal;
+	line-height: 1.428571429;
+	padding: 6px 10px;
+	padding: 0.428571429rem 0.714285714rem;
+}
+
+.wp-block-file .wp-block-file__button:hover,
+.wp-block-file .wp-block-file__button:focus {
+	background-color: #ebebeb;
+	background-image: -moz-linear-gradient(top, #f9f9f9, #ebebeb);
+	background-image: -ms-linear-gradient(top, #f9f9f9, #ebebeb);
+	background-image: -webkit-linear-gradient(top, #f9f9f9, #ebebeb);
+	background-image: -o-linear-gradient(top, #f9f9f9, #ebebeb);
+	background-image: linear-gradient(top, #f9f9f9, #ebebeb);
+	background-repeat: repeat-x;
+	color: #5e5e5e;
+}
+
+.wp-block-file .wp-block-file__button:focus {
+	background-color: #e1e1e1;
+	background-image: -moz-linear-gradient(top, #ebebeb, #e1e1e1);
+	background-image: -ms-linear-gradient(top, #ebebeb, #e1e1e1);
+	background-image: -webkit-linear-gradient(top, #ebebeb, #e1e1e1);
+	background-image: -o-linear-gradient(top, #ebebeb, #e1e1e1);
+	background-image: linear-gradient(top, #ebebeb, #e1e1e1);
+	background-repeat: repeat-x;
+	border-color: transparent;
+	box-shadow: inset 0 0 8px 2px #c6c6c6, 0 1px 0 0 #f4f4f4;
+	color: #757575;
+}
+
+.rtl .wp-block-file * + .wp-block-file__button {
+	margin-left: 0.75em;
+	margin-right: 0;
+}
+
+/* Video */
+
+.wp-block-video video:not(:last-child) {
+	margin-bottom: 0;
+}
+
+/*--------------------------------------------------------------
+3.0 Blocks - Formatting
+--------------------------------------------------------------*/
+
+/* Code */
+
+pre.wp-block-code {
+	border: 0;
+	padding: 0;
+}
+
+/* Pullquote */
+
+.wp-block-pullquote__citation,
+.wp-block-pullquote cite,
+.wp-block-pullquote footer {
+	font-size: 14px;
+	text-transform: none;
+}
+
+/* Table */
+
+.wp-block-table {
+	border-bottom: 1px solid #ededed;
+	border-collapse: collapse;
+	border-spacing: 0;
+	font-size: 14px;
+	line-height: 2;
+	margin: 0 0 20px;
+	width: 100%;
+}
+
+.wp-block-table th {
+	border: 0;
+	font-weight: bold;
+	padding: 6px 10px 6px 0;
+	text-transform: uppercase;
+}
+
+.wp-block-table td {
+	border: 0;
+	border-top: 1px solid #ededed;
+	padding: 6px 10px 6px 0;
+}
+
+/*--------------------------------------------------------------
+4.0 Blocks - Layout Elements
+--------------------------------------------------------------*/
+
+/* Buttons */
+
+.wp-block-button .wp-block-button__link,
+.wp-block-button .wp-block-button__link:visited {
+	background-color: #e6e6e6;
+	background-repeat: repeat-x;
+	background-image: -moz-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: -ms-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: -webkit-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: -o-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: linear-gradient(top, #f4f4f4, #e6e6e6);
+	border: 1px solid #d2d2d2;
+	border-radius: 3px;
+	box-shadow: 0 1px 2px rgba(64, 64, 64, 0.1);
+	color: #7c7c7c;
+	font-family: inherit;
+	font-size: 11px;
+	font-size: 0.785714286rem;
+	font-weight: normal;
+	line-height: 1.428571429;
+	padding: 6px 10px;
+	padding: 0.428571429rem 0.714285714rem;
+}
+
+.wp-block-button .wp-block-button__link:hover,
+.wp-block-button .wp-block-button__link:focus {
+	background-color: #ebebeb;
+	background-image: -moz-linear-gradient(top, #f9f9f9, #ebebeb);
+	background-image: -ms-linear-gradient(top, #f9f9f9, #ebebeb);
+	background-image: -webkit-linear-gradient(top, #f9f9f9, #ebebeb);
+	background-image: -o-linear-gradient(top, #f9f9f9, #ebebeb);
+	background-image: linear-gradient(top, #f9f9f9, #ebebeb);
+	background-repeat: repeat-x;
+	color: #5e5e5e;
+}
+
+.wp-block-button .wp-block-button__link:active {
+	background-color: #e1e1e1;
+	background-image: -moz-linear-gradient(top, #ebebeb, #e1e1e1);
+	background-image: -ms-linear-gradient(top, #ebebeb, #e1e1e1);
+	background-image: -webkit-linear-gradient(top, #ebebeb, #e1e1e1);
+	background-image: -o-linear-gradient(top, #ebebeb, #e1e1e1);
+	background-image: linear-gradient(top, #ebebeb, #e1e1e1);
+	background-repeat: repeat-x;
+	border-color: transparent;
+	box-shadow: inset 0 0 8px 2px #c6c6c6, 0 1px 0 0 #f4f4f4;
+	color: #757575;
+}
+
+/* Separator */
+
+.wp-block-separator {
+	border: 0;
+}
+
+/*--------------------------------------------------------------
+5.0 Blocks - Widgets
+--------------------------------------------------------------*/
+
+/* Latest Comments */
+
+.wp-block-latest-comments {
+	margin: 0;
+	padding: 0;
+}
+
+.wp-block-latest-comments .avatar,
+.wp-block-latest-comments__comment-avatar {
+	border-radius: 0;
+	box-shadow: none;
+}
+
+.has-avatars .wp-block-latest-comments__comment .wp-block-latest-comments__comment-excerpt,
+.has-avatars .wp-block-latest-comments__comment .wp-block-latest-comments__comment-meta {
+	margin-left: 60px;
+}
+
+.wp-block-latest-comments__comment,
+.wp-block-latest-comments__comment-excerpt,
+.wp-block-latest-comments__comment-excerpt p {
+	font-size: 14px;
+}
+
+.wp-block-latest-comments__comment-excerpt p:last-child {
+	margin-bottom: 0;
+}
+
+.wp-block-latest-comments__comment-date {
+	color: #5e5e5e;
+}
+
+.wp-block-latest-comments .wp-block-latest-comments__comment {
+	margin: 0;
+	padding: 24px 0;
+	padding: 1.714285714rem 0 0;
+}
+
+.wp-block-latest-comments article {
+	margin-bottom: 0;
+}
+
+/*--------------------------------------------------------------
+6.0 Blocks - Colors
+--------------------------------------------------------------*/
+
+.has-blue-color {
+	color: #21759b;
+}
+
+.has-blue-background-color {
+	background-color: #21759b;
+}
+
+.has-dark-gray-color {
+	color: #373737;
+}
+
+.has-dark-gray-background-color {
+	background-color: #373737;
+}
+
+.has-medium-gray-color {
+	color: #9f9f9f;
+}
+
+.has-medium-gray-background-color {
+	background-color: #9f9f9f;
+}
+
+.has-light-gray-color {
+	color: #e6e6e6;
+}
+
+.has-light-gray-background-color {
+	background-color: #e6e6e6;
+}
+
+.has-white-color {
+	color: #fff;
+}
+
+.has-white-background-color {
+	background-color: #fff;
+}
Index: src/wp-content/themes/twentytwelve/css/editor-blocks.css
===================================================================
--- src/wp-content/themes/twentytwelve/css/editor-blocks.css	(nonexistent)
+++ src/wp-content/themes/twentytwelve/css/editor-blocks.css	(working copy)
@@ -0,0 +1,424 @@
+/*
+Theme Name: Twenty Twelve
+Description: Used to style Gutenberg Blocks in the editor.
+*/
+
+/*--------------------------------------------------------------
+>>> TABLE OF CONTENTS:
+----------------------------------------------------------------
+1.0 General Typography
+2.0 General Block Styles
+3.0 Blocks - Common Blocks
+4.0 Blocks - Formatting
+5.0 Blocks - Layout Elements
+6.0 Blocks - Widgets
+--------------------------------------------------------------*/
+
+/*--------------------------------------------------------------
+1.0 General Typography
+--------------------------------------------------------------*/
+
+.edit-post-visual-editor .editor-block-list__block,
+.edit-post-visual-editor .editor-block-list__block p,
+.editor-default-block-appender input[type="text"].editor-default-block-appender__content {
+	font-size: 14px;
+}
+
+.edit-post-visual-editor .editor-block-list__block {
+	color: #444;
+}
+
+.editor-post-title__block .editor-post-title__input {
+	font-family: "Open Sans", Helvetica, Arial, sans-serif;
+	font-size: 20px;
+	font-weight: 400;
+}
+
+@media screen and (min-width: 600px) {
+	.editor-post-title__block .editor-post-title__input {
+		font-size: 22px;
+	}
+}
+
+.wp-block-freeform.block-library-rich-text__tinymce h1 {
+	font-size: 21px;
+}
+
+.wp-block-freeform.block-library-rich-text__tinymce h2 {
+	font-size: 18px;
+}
+
+.wp-block-freeform.block-library-rich-text__tinymce h3 {
+	font-size: 16px;
+}
+
+.wp-block-freeform.block-library-rich-text__tinymce h4 {
+	font-size: 14px;
+}
+
+.wp-block-freeform.block-library-rich-text__tinymce h5 {
+	font-size: 13px;
+}
+
+.wp-block-freeform.block-library-rich-text__tinymce h6 {
+	font-size: 12px;
+}
+
+/*--------------------------------------------------------------
+2.0 General Block Styles
+--------------------------------------------------------------*/
+
+/* Main column width */
+
+body.gutenberg-editor-page .edit-post-visual-editor .editor-post-title__block,
+body.gutenberg-editor-page .edit-post-visual-editor .editor-default-block-appender,
+body.gutenberg-editor-page .edit-post-visual-editor .editor-block-list__block {
+	max-width: 655px;
+}
+
+/* Link styles */
+
+.edit-post-visual-editor a,
+.editor-block-list__block a,
+.wp-block-freeform.block-library-rich-text__tinymce a {
+	color: #21759b;
+}
+
+/* List styles */
+
+.wp-block-freeform.block-library-rich-text__tinymce ol,
+.wp-block-freeform.block-library-rich-text__tinymce ul:not(.wp-block-gallery),
+.block-library-list ol.editor-rich-text__tinymce,
+.block-library-list ul.editor-rich-text__tinymce:not(.wp-block-gallery) {
+	padding-left: 0;
+	padding-right: 0;
+}
+
+/* Quote styles */
+
+.wp-block-freeform.block-library-rich-text__tinymce blockquote {
+	border: 0;
+	font-style: italic;
+	padding: 24px;
+}
+
+/* Table styles */
+
+.wp-block-freeform.block-library-rich-text__tinymce th {
+	font-size: 11px;
+}
+
+.wp-block-freeform.block-library-rich-text__tinymce td {
+	font-size: 12px;
+}
+
+.wp-block-freeform.block-library-rich-text__tinymce th,
+.wp-block-freeform.block-library-rich-text__tinymce td {
+	padding-left: 0;
+	padding-right: 0;
+}
+
+.rtl .wp-block-freeform.block-library-rich-text__tinymce th,
+.rtl .wp-block-freeform.block-library-rich-text__tinymce td {
+	text-align: right;
+}
+
+/* Code styles */
+
+.wp-block-freeform.block-library-rich-text__tinymce code {
+	background-color: transparent;
+	font-size: 12px;
+}
+
+/* Pre styles */
+
+.wp-block-freeform.block-library-rich-text__tinymce pre {
+	font-size: 12px;
+}
+
+/* Captions */
+
+[class^="wp-block-"] figcaption,
+[class^="wp-block-"] figcaption.editor-rich-text__tinymce.mce-content-body {
+	color: #757575;
+	font-size: 12px;
+	line-height: 2;
+	font-style: italic;
+	text-align: left;
+}
+
+.rtl [class^="wp-block-"] figcaption,
+.rtl [class^="wp-block-"] figcaption.editor-rich-text__tinymce.mce-content-body {
+	text-align: right;
+}
+
+/* Definition Lists */
+
+.wp-block-freeform.block-library-rich-text__tinymce dt {
+	margin-bottom: 0;
+}
+
+/*--------------------------------------------------------------
+3.0 Blocks - Common Blocks
+--------------------------------------------------------------*/
+
+/* Paragraph */
+
+p.has-drop-cap:not(:focus)::first-letter {
+	font-size: 5em;
+	margin-top: 0.1em;
+}
+
+/* Image */
+
+.wp-block-image {
+	margin-left: 0;
+	margin-right: 0;
+}
+
+/* Gallery */
+
+.wp-block-gallery {
+	margin-bottom: 24px;
+}
+
+.wp-block-gallery figcaption,
+.wp-block-gallery figcaption.editor-rich-text__tinymce.mce-content-body {
+	color: #fff;
+	text-align: center;
+}
+
+/* Quote */
+
+.wp-block-quote,
+.wp-block-quote:not(.is-large):not(.is-style-large) {
+	padding: 24px;
+}
+
+.wp-block-quote p {
+	font-style: italic;
+}
+
+.wp-block-quote:not(.is-large):not(.is-style-large) {
+	border: 0;
+}
+
+.wp-block-quote.is-large p,
+.wp-block-quote.is-style-large p {
+	font-size: 20px;
+}
+
+.wp-block-quote .wp-block-quote__citation {
+	color: inherit;
+	font-style: italic;
+}
+
+.wp-block-quote.is-large .wp-block-quote__citation,
+.wp-block-quote.is-style-large .wp-block-quote__citation {
+	font-size: 18px;
+}
+
+/* Cover Image */
+
+.edit-post-visual-editor .editor-block-list__block .wp-block-cover-image p {
+	font-size: 28px;
+}
+
+/* File */
+
+.wp-block-file .wp-block-file__textlink {
+	color: #21759b;
+	text-decoration: underline;
+}
+
+.wp-block-file .wp-block-file__button,
+.wp-block-button .wp-block-button__link:hover {
+	background-color: #e6e6e6;
+	background-repeat: repeat-x;
+	background-image: -moz-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: -ms-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: -webkit-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: -o-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: linear-gradient(top, #f4f4f4, #e6e6e6);
+	border: 1px solid #d2d2d2;
+	border-radius: 3px;
+	box-shadow: 0 1px 2px rgba(64, 64, 64, 0.1);
+	color: #7c7c7c;
+	font-family: inherit;
+	font-size: 11px;
+	font-weight: normal;
+	line-height: 1.428571429;
+	padding: 6px 10px;
+}
+
+/*--------------------------------------------------------------
+4.0 Blocks - Formatting
+--------------------------------------------------------------*/
+
+/* Verse */
+
+.editor-block-list__block .wp-block-verse pre {
+	font-size: 12px;
+}
+
+/* Code */
+
+.wp-block-code {
+	border: 0;
+	font-size: 12px;
+	line-height: 2;
+	padding: 0;
+}
+
+.wp-block-html .CodeMirror-sizer {
+	line-height: 1.7;
+}
+
+/* Preformatted */
+
+.editor-block-list__block .wp-block-preformatted pre {
+	font-size: 12px;
+}
+
+/* Pullquote */
+
+.wp-block-pullquote {
+	font-style: italic;
+}
+
+.edit-post-visual-editor .wp-block-pullquote {
+	margin: 0;
+}
+
+.wp-block-pullquote .wp-block-pullquote__citation,
+.wp-block-pullquote cite {
+	font-size: 14px;
+	text-transform: none;
+}
+
+/* Table */
+
+.wp-block-table {
+	border-bottom: 1px solid #ededed;
+	border-collapse: collapse;
+	border-spacing: 0;
+	font-size: 14px;
+	line-height: 2;
+	margin: 0 0 20px;
+	width: 100%;
+}
+
+.editor-block-list__block .wp-block-table th {
+	border: 0;
+	font-size: 11px;
+	font-weight: bold;
+	text-transform: uppercase;
+}
+
+.editor-block-list__block .wp-block-table td {
+	border: 0;
+	border-top: 1px solid #ededed;
+	font-size: 12px;
+	padding: 0;
+}
+
+.wp-block-table__cell-content {
+	padding: 6px 10px 6px 0;
+}
+
+/*--------------------------------------------------------------
+5.0 Blocks - Layout Elements
+--------------------------------------------------------------*/
+
+/* Buttons */
+
+.wp-block-button .wp-block-button__link,
+.wp-block-button .wp-block-button__link:hover {
+	background-color: #e6e6e6;
+	background-repeat: repeat-x;
+	background-image: -moz-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: -ms-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: -webkit-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: -o-linear-gradient(top, #f4f4f4, #e6e6e6);
+	background-image: linear-gradient(top, #f4f4f4, #e6e6e6);
+	border: 1px solid #d2d2d2;
+	border-radius: 3px;
+	box-shadow: 0 1px 2px rgba(64, 64, 64, 0.1);
+	color: #7c7c7c;
+	font-family: inherit;
+	font-size: 11px;
+	font-weight: normal;
+	line-height: 1.428571429;
+	padding: 6px 10px;
+}
+
+/* Separator */
+
+.editor-block-list__block hr.wp-block-separator {
+	margin-left: auto;
+	margin-right: auto;
+}
+
+/*--------------------------------------------------------------
+6.0 Blocks - Widgets
+--------------------------------------------------------------*/
+
+/* Archives */
+.gutenberg ul.wp-block-archives {
+	padding-left: 0;
+}
+
+/* Categories */
+
+.gutenberg .wp-block-categories ul {
+	padding-left: 0;
+}
+
+/* Latest Comments */
+
+.editor-block-list__block .wp-block-latest-comments {
+	margin: 0;
+	padding: 0;
+}
+
+.wp-block-latest-comments .avatar,
+.wp-block-latest-comments__comment-avatar {
+	border-radius: 0;
+	box-shadow: none;
+}
+
+.has-avatars .wp-block-latest-comments__comment .wp-block-latest-comments__comment-excerpt,
+.has-avatars .wp-block-latest-comments__comment .wp-block-latest-comments__comment-meta {
+	margin-left: 60px;
+}
+
+.wp-block-latest-comments__comment,
+.wp-block-latest-comments__comment-excerpt,
+.wp-block-latest-comments__comment-excerpt p {
+	font-size: 14px;
+}
+
+.wp-block-latest-comments__comment-excerpt p:last-child {
+	margin-bottom: 0;
+}
+
+.wp-block-latest-comments__comment-date {
+	color: #5e5e5e;
+}
+
+.wp-block-latest-comments .wp-block-latest-comments__comment {
+	margin: 0;
+	padding: 24px 0;
+}
+
+.wp-block-latest-comments article {
+	border-bottom: 4px double #ededed;
+	padding-bottom: 2em;
+}
+
+/* Latest Posts */
+
+.gutenberg .wp-block-latest-posts {
+	padding-left: 0;
+	padding-right: 0;
+}
Index: src/wp-content/themes/twentytwelve/functions.php
===================================================================
--- src/wp-content/themes/twentytwelve/functions.php	(revision 43773)
+++ src/wp-content/themes/twentytwelve/functions.php	(working copy)
@@ -54,6 +54,41 @@
 	// This theme styles the visual editor with editor-style.css to match the theme style.
 	add_editor_style();
 
+	// Load regular editor styles into the new block-based editor.
+	add_theme_support( 'editor-styles' );
+
+	// Load default block styles.
+	add_theme_support( 'wp-block-styles' );
+
+	// Add support for custom color scheme.
+	add_theme_support( 'editor-color-palette', array(
+		array(
+			'name'  => __( 'Blue', 'twentytwelve' ),
+			'slug'  => 'blue',
+			'color' => '#21759b',
+		),
+		array(
+			'name'  => __( 'Dark Gray', 'twentytwelve' ),
+			'slug'  => 'dark-gray',
+			'color' => '#444',
+		),
+		array(
+			'name'  => __( 'Medium Gray', 'twentytwelve' ),
+			'slug'  => 'medium-gray',
+			'color' => '#9f9f9f',
+		),
+		array(
+			'name'  => __( 'Light Gray', 'twentytwelve' ),
+			'slug'  => 'light-gray',
+			'color' => '#e6e6e6',
+		),
+		array(
+			'name'  => __( 'White', 'twentytwelve' ),
+			'slug'  => 'white',
+			'color' => '#fff',
+		),
+	) );
+
 	// Adds RSS feed links to <head> for posts and comments.
 	add_theme_support( 'automatic-feed-links' );
 
@@ -151,6 +186,9 @@
 	// Loads our main stylesheet.
 	wp_enqueue_style( 'twentytwelve-style', get_stylesheet_uri() );
 
+	// Theme block stylesheet.
+	wp_enqueue_style( 'twentytwelve-block-style', get_template_directory_uri() . '/css/blocks.css', array( 'twentytwelve-style' ), '20181018' );
+
 	// Loads the Internet Explorer specific stylesheet.
 	wp_enqueue_style( 'twentytwelve-ie', get_template_directory_uri() . '/css/ie.css', array( 'twentytwelve-style' ), '20121010' );
 	$wp_styles->add_data( 'twentytwelve-ie', 'conditional', 'lt IE 9' );
@@ -158,6 +196,19 @@
 add_action( 'wp_enqueue_scripts', 'twentytwelve_scripts_styles' );
 
 /**
+ * Enqueue editor styles for Gutenberg
+ *
+ * @since Twenty Twelve 2.6
+ */
+function twentytwelve_block_editor_styles() {
+	// Block styles.
+	wp_enqueue_style( 'twentytwelve-block-editor-style', get_template_directory_uri() . '/css/editor-blocks.css' );
+	// Add custom fonts.
+	wp_enqueue_style( 'twentytwelve-fonts', twentytwelve_get_font_url(), array(), null );
+}
+add_action( 'enqueue_block_editor_assets', 'twentytwelve_block_editor_styles' );
+
+/**
  * Add preconnect for Google Fonts.
  *
  * @since Twenty Twelve 2.2