Merge "amis-saas-4921 颜色框-属性配置-拾色器-备选色，新增备选色，备选色未选择颜色，预览态下页面报错" into feat-optimize-4

packages/amis-editor/src/plugin/Form/InputColor.tsx

@@ -156,7 +156,7 @@ export class ColorControlPlugin extends BasePlugin {
           key: `${color}-${index}`,
           color: convertColor(color, format)
         })),
-      pipeOut: (value: any[]) => value.map(({color}) => color)
+      pipeOut: (value: any[]) => value.map(({color = ''}) => color)
     });
   }