Function rgbTo8hex

packages/backend/src/common/color.ts:14–24

(color: RGB, alpha: number)

};

export const rgbTo8hex = (color: RGB, alpha: number): string => {
  // when color is RGBA, alpha is set automatically
  // when color is RGB, alpha need to be set manually (default: 1.0)
  const hex =
    ((alpha * 255) | (1 << 8)).toString(16).slice(1) +
    ((color.r * 255) | (1 << 8)).toString(16).slice(1) +
    ((color.g * 255) | (1 << 8)).toString(16).slice(1) +
    ((color.b * 255) | (1 << 8)).toString(16).slice(1);

  return hex;
};

/**
 * Converts RGB values to CSS hex or rgba format