The OKLCH value type (saastarter-parity Phase 1). saastarter's themes are OKLCH (globals.css), the modern
perceptually-uniform color space — lightness, chroma, hue are independent, which is exactly what makes a
deterministic light→dark derivation tractable (you move L without smearing hue). Pure value type + parse/format;
no CSS engine, no deps.
The OKLCH value type (saastarter-parity Phase 1). saastarter's themes are OKLCH (globals.css), the modern perceptually-uniform color space — lightness, chroma, hue are independent, which is exactly what makes a deterministic light→dark derivation tractable (you move L without smearing hue). Pure value type + parse/format; no CSS engine, no deps.