grayscale static method

List<double> grayscale()

(0.2126 * color.red + 0.7152 * color.green + 0.0722 * color.blue)

Implementation

static List<double> grayscale() {
  return <double>[
    0.2126,
    0.7152,
    0.0722,
    0,
    0,
    0.2126,
    0.7152,
    0.0722,
    0,
    0,
    0.2126,
    0.7152,
    0.0722,
    0,
    0,
    0,
    0,
    0,
    1,
    0,
  ];
}