Function applyPrimaryColor

internal-plugins/setting/src/utils/themeUtils.ts:56–63

(primaryColor: PrimaryColor, customColor?: string)

 * 应用主题色类名；当主题色为 custom 时同步写入自定义色变量。
 */
export function applyPrimaryColor(primaryColor: PrimaryColor, customColor?: string): void {
  document.body.className = document.body.className.replace(/theme-\w+/g, '').trim()
  document.body.classList.add(`theme-${primaryColor}`)

  if (primaryColor === 'custom' && typeof customColor === 'string' && customColor) {
    applyCustomColor(customColor)
  }
}

function hexToRgb(hex: string): { r: number; g: number; b: number } | null {
  const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex)