OKLCH Color Science & Dual Registers

BOB-Astro completely abandons legacy RGB/HEX color models in favor of the OKLCH perceptual color space.

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1. Why OKLCH?

Unlike sRGB and HSL:

• Perceptual Uniformity: Equal numerical changes in Lightness ($L$) and Chroma ($C$) produce equal perceived visual changes.
• Predictable Contrast: Ensures WCAG AAA contrast compliance across all hues without manual tweaking.
• P3 Wide Gamut: Unlocks more vibrant, luminous highlights on modern displays.

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2. Dual Visual Registers

BOB-Astro introduces Dual Visual Registers:

1. Obsidian Dark Luxury:
   • Deep obsidian canvas (oklch(0.12 0.015 260)), subtly tinted toward the brand hue to eliminate flat unnatural blacks.
   • Ideal for luxury agency, creative studio, and futuristic tech products.
2. Solar Paper Light Mode:
   • Tactile warm paper canvas (oklch(0.97 0.01 75)), with deep ink typography (oklch(0.18 0.02 75)).
   • Zero-flash toggling via data-theme="light" on <html />.

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3. The 6 Mathematical Presets

All 6 presets are defined mathematically in src/config/site.config.ts:

• Solar Amber: oklch(0.75 0.16 75)
• Cyber Emerald: oklch(0.78 0.17 150)
• Deep Cobalt: oklch(0.72 0.18 245)
• Cosmic Crimson: oklch(0.70 0.22 25)
• Quantum Violet: oklch(0.74 0.20 305)
• Solar Paper: oklch(0.55 0.16 75)