relativeLuminance static method

double relativeLuminance(
  1. int color
)

Calculate relative luminance (0.0 - 1.0) per WCAG 2.1.

Implementation

static double relativeLuminance(int color) {
  final double r = _linearize((color >> 16) & 0xFF);
  final double g = _linearize((color >> 8) & 0xFF);
  final double b = _linearize(color & 0xFF);
  return 0.2126 * r + 0.7152 * g + 0.0722 * b;
}