🎨 Nebula UI: Color System Overhaul (#43)

[jpequegn]

Summary

Complete implementation of Nebula UI's dark blue accent and dark theme foundations, replacing the current purple/violet color scheme to align with the internal power-user design system.

Changes Made

CSS Variables Update (styles.css)

• ✅ Replaced --primary from #4f46e5 to #1F4E8C (Nebula dark blue)
• ✅ Updated --background to #121317 (very dark, near-black)
• ✅ Updated --surface to #1E2130 (dark charcoal)
• ✅ Updated --text-primary to #E0E6F0
• ✅ Updated --text-secondary to #A3A9BF
• ✅ Updated --divider to #333A56
• ✅ Updated gradients and glass morphism effects
• ✅ Replaced hardcoded purple colors (#4f46e5, #8b5cf6, #6366f1)

Theme Manager Updates (themes.js)

• ✅ Updated applyDarkTheme() with complete Nebula color palette
• ✅ Updated applyLightTheme() to maintain Nebula consistency
• ✅ Set dark theme as default preference
• ✅ Updated CSS custom properties in theme switching

Tailwind Config Updates (index-modern.html)

• ✅ Replaced violet/purple gradients with blue equivalents
• ✅ Updated all UI components to use Nebula-compliant colors
• ✅ Maintained visual hierarchy while switching color system

Testing

• ✅ Unit tests pass (84/84 tests passing)
• ✅ Linting completed with no new errors
• ✅ E2E tests show proper asset loading and functionality
• ✅ All UI components now use Nebula's dark blue accent (#1F4E8C)
• ✅ Dark theme is visually consistent with Nebula style guide
• ✅ Theme switching maintains color consistency

Acceptance Criteria Met

• ✅ All UI components use Nebula's dark blue accent (#1F4E8C)
• ✅ Dark theme is visually consistent with Nebula style guide
• ✅ Theme switching maintains color consistency
• ✅ No purple/violet colors remain in the interface
• ✅ Dark theme is now the default preference

Visual Impact

This change transforms the entire UI from a purple/violet theme to a sophisticated dark blue Nebula theme that:

• Provides a more professional, power-user aesthetic
• Maintains excellent contrast and accessibility
• Preserves all existing functionality while updating visual identity
• Establishes consistency with Nebula UI design system

Breaking Changes

None - all functionality remains intact while updating the visual theme.

Fixes #43

🤖 Generated with Claude Code

[openhands-ai]

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