text: /**
   * 颜色计算
   */
  export const tintColor = (c, tint) => {
    const color = c.replace('#', '');
    let red = parseInt(color.slice(0, 2), 16);
    let green = parseInt(color.slice(2, 4), 16);
    let blue = parseInt(color.slice(4, 6), 16);
  
    if (tint === 0) { // when primary color is in its rgb space
      return [red, green, blue].join(',');
    } else {
      red += Math.round(tint * (255 - red));
      green += Math.round(tint * (255 - green));
      blue += Math.round(tint * (255 - blue));
      red = red.toString(16);
      green = green.toString(16);
      blue = blue.toString(16);
      return `#${ red }${ green }${ blue }`;
    }
  };
  