@evg-b/evg-ui/dist/styles/Color/ColorContrast.js

EVG-UI library inspired by Material Design.

function Contrast() {
  // 1) color принимать в формате HEX    
  var Brightness = Math.sqrt(this.r * this.r * 0.241 + this.g * this.g * 0.691 + this.b * this.b * 0.068);
  return Brightness < 140 ? {
    r: 255,
    g: 255,
    b: 255
  } : {
    r: 0,
    g: 0,
    b: 0
  };
}

export default Contrast;