Color Palette Expansion Guide

Expand this core color palette into a complete design system palette:

**Core Colors:**
- Primary: ${{PRIMARY_COLOR}}
- Secondary: ${{SECONDARY_COLOR}}
- Accent: ${{ACCENT_COLOR}}

**Expansion Needs:**
- Number of Tints/Shades: ${{TINT_SHADE_COUNT}}
- Neutral Range Needed: ${{NEUTRAL_RANGE}}
- Semantic Colors: ${{SEMANTIC_COLORS_NEEDED}}
- Special Use Cases: ${{SPECIAL_USE_CASES}}

Please create:

1. **Primary Color Expansion**
   - 50 (lightest tint)
   - 100
   - 200
   - 300
   - 400
   - 500 (base)
   - 600
   - 700
   - 800
   - 900 (darkest shade)
   - Color values with naming

2. **Secondary Color Expansion**
   - Full tint/shade scale
   - Relationship to primary
   - Usage differentiation

3. **Accent Color Expansion**
   - Limited scale (if needed)
   - High-contrast variants
   - Usage restrictions

4. **Neutral/Gray Scale**
   - True neutrals
   - Warm neutrals
   - Cool neutrals
   - 10-step scale each
   - Text color recommendations

5. **Semantic Color System**
   - Success: Full scale
   - Warning: Full scale
   - Error: Full scale
   - Info: Full scale
   - Background variants
   - Border variants
   - Text variants

6. **Interactive States**
   - Default colors
   - Hover variants
   - Active/pressed
   - Focus indicators
   - Disabled states

7. **Surface Colors**
   - Background levels
   - Card surfaces
   - Elevated surfaces
   - Overlay colors
   - Modal backgrounds

8. **Border Colors**
   - Default borders
   - Subtle borders
   - Strong borders
   - Focus borders
   - Error borders

9. **Transparency Variants**
   - Alpha values for overlays
   - Shadow colors
   - Scrim colors
   - Glass effects

10. **Dark Mode Palette**
    - Inverted scale approach
    - Surface color adjustments
    - Text color modifications
    - Accent adjustments
    - Semantic color shifts

Provide complete hex values with design token naming conventions.