Hover on Upload files media Library tabs and drop to upload file overlay color has still old color

[opurockey]

In Upload files media Library tabs and drop to upload file overlay section, It is still showing old color.

Ticket: https://core.trac.wordpress.org/ticket/65001

## Description:

This PR updates the color usage in media-view.css to align with the modern WordPress admin color system by replacing hardcoded/legacy color values with standardized admin color variables.

As part of ongoing efforts in WordPress core to reduce color inconsistencies and adopt a unified color palette using CSS custom properties, admin styles are being refactored to use semantic color tokens instead of fixed values.

## Changes Made:

• Replaced legacy color values used in: :hover :focus
• interactive states and UI elements
• Updated styles to use: WP admin color variables (e.g. --wp-admin-theme-color, --wp-admin-theme-color-darker-*, etc.)
• Removed outdated or hardcoded hex values to ensure consistency with the admin color system

## Why This Change:

• Ensures visual consistency across WordPress admin UI
• Improves maintainability by centralizing color definitions
• Aligns with WordPress core direction of using CSS custom properties for theming and extensibility
• Improves compatibility with different admin color schemes and future design updates

## Impact:

• No functional changes
• Purely visual/style refactor
• Affects only media-view components in admin
• Better integration with admin color schemes-

## Testing Instructions:

• Open Media Library (Grid and List view)
• Hover and focus on: Media items Buttons and controls
• Verify: Colors match WP admin theme, No regressions in hover/focus states
• Test across different admin color schemes

## Screenshot:

[audrasjb]

@opurockey thanks for the ticket and PR, however the above screenshot seems to have color contrast issues between text and background.

[joedolson]

@audrasjb I'm not seeing the color contrast change you're asking about. Can you be more specific? I'd also say that the uploaded screenshot doesn't reflect the current PR; the screenshot shows gray text on the new blue background, but the PR uses white text.

@OpuRockey, I believe you have already submitted PR #11375, which is similar to this one. However, let's prioritize this PR. Please apply ​this feedback from that PR to this one as well.

[manhar]

As I see and confirm, This is still use old color on hover.

Refer the below image :

​https://postimg.cc/jLmGRgY0

There's an additional color overlooked here, on .media-modal-close:focus, which should also be updated.

@joedolson , I’ve addressed the requested changes. Let me know if anything else is needed.

@OpuRockey, I believe you have already submitted PR #11375, which is similar to this one. However, let's prioritize this PR. Please apply ​this feedback from that PR to this one as well.

@t-hamano , All suggested changes have been incorporated. Kindly review again.

[opurockey]

Replying to manhar:

As I see and confirm, This is still use old color on hover.

Refer the below image :

​https://postimg.cc/jLmGRgY0

@manhar, Could you please pull and check that again after clearing the browser cache? Thanks.

[wildworks]

#65010 was marked as a duplicate.

@t-hamano, Thanks for the suggestions. I’ve applied the changes. Please review.

[manhar]

Replying to opurockey:

Replying to manhar:

As I see and confirm, This is still use old color on hover.

Refer the below image :

​https://postimg.cc/jLmGRgY0

@manhar, Could you please pull and check that again after clearing the browser cache? Thanks.

@opurockey Yes, it is working properly .

Thanks for Information.

[joedolson]

In 62199:

Media: Update upload file overlay colors.

Update the colors used for the file upload overlay mask to use the new admin theme colors.

Props opurockey, huzaifaalmesbah, wildworks, audrasjb, manhar, joedolson.
Fixes #65001.

[joedolson]

Re-opening for review to merge to the 7.0 branch.

[wildworks]

Reviewed and approved for 7.0.

[joedolson]

In 62204:

Media: Update upload file overlay colors.

Update the colors used for the file upload overlay mask to use the new admin theme colors.

Reviewed by wildworks.
Merges 62199 to the 7.0 branch.

Props opurockey, huzaifaalmesbah, wildworks, audrasjb, manhar, joedolson.
Fixes #65001.