If it's possible to have the Color selector show circular-shaped colors instead of square

将以下 CSS 代码放入插件设置页面 -> 选项卡 -> “自定义 CSS 代码“：

.woof_color_term{
   border-radius: 80px !important;
}

.woof_color_term:hover{
    border-color: #444;
    border-style: dotted;
}

颜色框的大小可通过以下方式调整:

.woof_color_term{
    width: 26px !important;
    height: 26px !important;
}