[8.1图片大小](%E5%9B%BE%E7%89%87.md) [8.2颜色代码](8.2%E9%A2%9C%E8%89%B2%E4%BB%A3%E7%A0%81.md) [8.3小程序的美工技巧](8.3%E5%B0%8F%E7%A8%8B%E5%BA%8F%E7%9A%84%E7%BE%8E%E5%B7%A5%E6%8A%80%E5%B7%A7.md)