export function colorFromBackground()

in src/utils/utils.js [68:93]

• 20 lines of code
• 6 McCabe index (conditional complexity)

export function colorFromBackground(backgroundColor, contrastRatio = 2.4) {
  let color;
  const lightColor = rgbFromHex('#FFFFFF');
  const darkColor = rgbFromHex('#18171d');

  if (backgroundColor.startsWith('#')) {
    color = rgbFromHex(backgroundColor);
  } else if (backgroundColor.startsWith('rgba(')) {
    color = rgbFromString(backgroundColor, 5);
  } else if (backgroundColor.startsWith('rgb(')) {
    color = rgbFromString(backgroundColor, 4);
  }

  const luminance = relativeLuminance(color);
  const lightLuminance = relativeLuminance(lightColor);
  const darkLuminance = relativeLuminance(darkColor);

  const contrastLight = (lightLuminance + 0.05) / (luminance + 0.05);
  const contrastDark = (luminance + 0.05) / (darkLuminance + 0.05);

  // Using a default threshold contrast of 2.4 instead of 3
  // as this will solve weird color combinations in the mid tones
  return contrastLight >= contrastRatio || contrastLight > contrastDark
    ? labelColorOptions.light
    : labelColorOptions.dark;
}