Device preview dropdown: use active color for device icon when responsive styles are active

[ramonjd]

What

Colours the device icon on the editor's preview/view toggle when Responsive styles editing is on, reusing the synced-pattern purple.

Why

Nothing in the header signals that you're in responsive editing mode. Tinting the icon gives a persistent cue, matching the synced-pattern colour already used in the settings sidebar.

What changed

• Add an is-responsive-editing modifier to the preview dropdown, driven by the existing isResponsiveEditing flag.
• Tint the toggle with var(--wp-block-synced-color). The icon follows via currentColor, and the "View" text label is also tinted when the "Show button text labels" preference is on.

Manual testing

1. Open a template or post in the editor.
2. Open the View (preview) dropdown and enable Responsive styles.
3. Confirm the device icon in the header turns purple.
4. Switch device (Desktop / Tablet / Mobile) and confirm the tint persists.
5. Disable Responsive styles and confirm the icon returns to default.
6. Set "Show button text labels" to on in Preferences > Accessibility
7. Check that "View" also behaves the same way.

Kapture.2026-07-16.at.17.07.37.mp4

[github-actions]

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Co-authored-by: ramonjd <ramonopoly@git.wordpress.org>
Co-authored-by: tellthemachines <isabel_brison@git.wordpress.org>
Co-authored-by: noruzzamans <noruzzaman@git.wordpress.org>

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[noruzzamans]

Device icon in the header correctly turns purple when Responsive styles is enabled, tint persists across Desktop/Tablet/Mobile switches, and returns to default color when disabled.

Screen.Recording.2026-07-16.at.1.07.30.PM.mov

[github-actions]

Size Change: -6 B (0%)

Total Size: 7.72 MB

📦 View Changed

Filename	Size	Change
build/scripts/editor/index.min.js	499 kB	-139 B (-0.03%)
build/styles/editor/style-rtl.css	31.1 kB	+32 B (+0.1%)
build/styles/editor/style-rtl.min.css	26.4 kB	+30 B (+0.11%)
build/styles/editor/style.css	31.2 kB	+40 B (+0.13%)
build/styles/editor/style.min.css	26.4 kB	+31 B (+0.12%)

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[tellthemachines]

I'm happy to try this! We might want to add the color to the button classname too because of text labels:

[ramonjd]

add the color to the button classname too because of text labels

Done!

[tellthemachines]

LGTM now!

[tellthemachines]

Should we try to get this into 7.1? Cc @t-hamano

[github-actions]

I just cherry-picked this PR to the wp/7.1 branch to get it included in the next release: 5666e38

[t-hamano]

I just cherry-picked this PR to the release/23.6 branch to get it included in the next release: 12a2d97