diff --git a/src/shared/color.js b/src/shared/color.js
index bff29f61c7522427fba56cdb8c4e48c7dd03db25..fb2d2168dec73310853743b7b30b23e748586a8f 100644
--- a/src/shared/color.js
+++ b/src/shared/color.js
@@ -8,14 +8,14 @@
   a: number;
 }
  */
-export function hexToRgba (hex) {
+export function hexToRgba(hex) {
   // 异常情况
   if (!hex) {
     return {
       r: 0,
       g: 0,
       b: 0,
-      a: 0
+      a: 0,
     }
   }
   // 去掉 #
@@ -27,24 +27,24 @@ export function hexToRgba (hex) {
       r: 0,
       g: 0,
       b: 0,
-      a: 0
+      a: 0,
     }
   }
   // 格式化 tmpHex，使其变成 rrggbb 或 rrggbbaa
   if (tmpHexLen === 3 || tmpHexLen === 4) {
     // rgb => rrggbb || rgba => rrggbbaa
-    tmpHex = tmpHex.replace(/(\w{1})/g, 'r1r1')
+    tmpHex = tmpHex.replace(/(\w{1})/g, '$1$1')
   }
-  // r1 ~ a2
-  const [r1, r2, g1, g2, b1, b2, a1, a2] = tmpHex.match(/(\w{1})/g)
+  // rgba
+  let [sr, sg, sb, sa] = tmpHex.match(/(\w{2})/g)
   // rgb
-  const r = parseInt(r1) * 16 + parseInt(r2); const g = parseInt(g1) * 16 + parseInt(g2); const b = parseInt(b1) * 16 + parseInt(b2)
+  const r = parseInt(sr, 16), g = parseInt(sg, 16), b = parseInt(sb, 16)
 
-  if (!a1) {
+  if (!sa) {
     return { r, g, b, a: 1 }
   }
 
   return {
-    r, g, b, a: (`0x100${a1}${a2}` - 0x10000) / 255
+    r, g, b, a: (`0x100${sa}` - 0x10000) / 255
   }
 }