AMP_Customizer_Design_Settings::sanitize_color_scheme PHP Метод

    public static function sanitize_color_scheme($value)
    {
        $schemes = self::get_color_scheme_names();
        $scheme_slugs = array_keys($schemes);
        if (!in_array($value, $scheme_slugs)) {
            $value = self::DEFAULT_COLOR_SCHEME;
        }
        return $value;
    }