invert function

RGBA invert(
  1. RGBA color
)

Implementation

RGBA invert(RGBA color) {
  return new RGBA(
    red: clampPixel(255 - color.red),
    green: clampPixel(255 - color.green),
    blue: clampPixel(255 - color.blue),
    alpha: color.alpha,
  );
}