2026 theme fixes

[eli-w-king]

Fixes:
#290580
#290624
#290520
#290408

[Copilot]

Pull request overview

This PR updates the 2026 theme with several visual fixes including color scheme adjustments, icon handling, and styling improvements.

Changes:

• Updated the primary blue color across the light theme from #005FB8 to #0069CC for better visual consistency
• Fixed Apple button icon to use the light variant for both high contrast light and standard light themes
• Added semi-transparent background to dialog boxes and removed button shadows from chat todo list widgets in light theme
• Updated chat request bubble backgrounds and adjusted list highlight color in dark theme

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
src/vs/workbench/contrib/chat/browser/chatSetup/media/chatSetup.css	Adds .vs theme selector to use light Apple icon variant alongside high contrast light theme
extensions/theme-2026/themes/styles.css	Adds semi-transparent background to dialog boxes and removes box shadows from todo list widget buttons in light theme
extensions/theme-2026/themes/2026-light.json	Updates primary blue color scheme from #005FB8 to #0069CC across all UI elements and changes chat bubble backgrounds to solid colors
extensions/theme-2026/themes/2026-dark.json	Changes list highlight foreground color from #bfbfbf to #48A0C7 for better visibility

[Copilot]

The hover color for extension buttons (#0064CC) is inconsistent with the hover color for regular buttons (#0063C1). Since both extensionButton.prominentBackground and button.background use the same base color (#0069CC), their hover states should likely use the same darkening pattern. Consider changing extensionButton.prominentHoverBackground to #0063C1 to match button.hoverBackground.

Suggested change

	"extensionButton.prominentHoverBackground": "#0064CC",
	"extensionButton.prominentHoverBackground": "#0063C1",

[vs-code-engineering]

📬 CODENOTIFY

The following users are being notified based on files changed in this PR:

@bpasero

Matched files:

• src/vs/workbench/contrib/chat/browser/chatSetup/media/chatSetup.css