更新 'README.md'

README.md

@@ -107,6 +107,10 @@
 
 ### 颜色表
 
+- ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) `#f03c15`
+- ![#c5f015](https://placehold.it/15/c5f015/000000?text=+) `#c5f015`
+- ![#1589F0](https://placehold.it/15/1589F0/000000?text=+) `#1589F0`
+
 <table id="colors">
   <tr>
     <td bgcolor=AliceBlue><span style="color:blue">some <em>AliceBlue</em> text</span></td>