Media: Fix color of the inactive view-switcher link

[afercia]

In the Media list / grid, the color of the inactive (non-current) view switcher link is a very light gray #c3c4c7. See screenshots.

Against the white background, the Contrast Ratio is only 1.74:1. It should be at least 4.5:1.

Besides WCAG compliance, the inactive link looks disabled, while it is perfectly functional.

After the admin reskin, the gray color that provides a minimum contrast ratio is #757575.

[valani9099]

@afercia I’d like to work on a patch for this ticket. I’ll test the proposed color change and share a pull request once it is ready.

This PR changes the inactive Media Library view switcher icon color from #c3c4c7 to #757575.

The updated color increases the contrast ratio against the white background from 1.74:1 to approximately 4.61:1, making the inactive but functional view switcher easier to identify.

Trac ticket: https://core.trac.wordpress.org/ticket/66081

## Testing instructions

1. Navigate to Media → Library.
2. Switch between List and Grid views.
3. Verify that the inactive view switcher icon uses #757575.
4. Verify that the current, hover, and keyboard focus states continue to work correctly.

## Checks performed

• npm run grunt -- precommit:css
• npm run build:dev

Both commands completed successfully.

## Use of AI Tools

AI assistance: Yes
Tool(s): ChatGPT Codex
Model(s): GPT-5
Used for: Identifying the relevant CSS selector and providing testing and contribution workflow guidance. The final change and command results were reviewed by me.

[valani9099]

I have opened a pull request to improve the contrast of the inactive Media Library view switcher:

​https://github.com/WordPress/wordpress-develop/pull/13464

The change updates the inactive icon color from #c3c4c7 to #757575. The CSS lint and development build checks completed successfully. Testing and feedback are welcome.

Tested this PR using WordPress Playground.

I switched between the List and Grid views in Media Library and verified that the inactive view-switcher icon now uses #757575. The updated icon has improved contrast and the view switching continues to work correctly.

The change works as expected. Screenshot attached.