oklab

Perceptual color types and conversions for the Oklab/Oklch color spaces in Dart.

Features

• OklabColor and OklchColor value types
• RGB <-> Oklab <-> Oklch conversion
• Alpha-preserving interpolation and copy helpers
• Input normalization for safe construction
• Max in-gamut Oklch chroma search for a given lightness and hue
• Oklch gamut helpers (isOklchInSrgbGamut, clampOklchChromaToSrgbGamut)

Usage

import 'package:oklab/oklab.dart';

final oklab = OklabColor.fromRgb(64, 160, 208);
final oklch = oklab.toOklch();

final adjusted = oklch.copyWith(
  lightness: 0.72,
  chroma: oklch.chroma * 0.8,
);

final maxChroma = maxOklchChroma(0.72, 280.0);
final safeChroma = clampOklchChromaToSrgbGamut(0.72, 0.3, 280.0);
final isSafe = isOklchInSrgbGamut(0.72, safeChroma, 280.0);
final safeAdjusted = adjusted.clampChromaToSrgbGamut();

final (r, g, b, a) = adjusted.toRgb();

Related package

Use oklab_flutter for Flutter Color interop.