[故障] 解决tag在color属性非法时报错的问题，关联了@6193

Author: rdkmaster

src/app/demo/pc/tag/basic/demo.component.html

@@ -23,3 +23,8 @@
     <jigsaw-tag color="#01c5c2">#01c5c2</jigsaw-tag>
     <jigsaw-tag color="#a17660">#a17660</jigsaw-tag>
 </p>
+<p style="color:#fff; margin-top:24px;">
+    <jigsaw-tag [color]="null">非法值1</jigsaw-tag>
+    <jigsaw-tag [color]="112233">非法值2</jigsaw-tag>
+    <jigsaw-tag [color]="{}">非法值3</jigsaw-tag>
+</p>

src/jigsaw/pc-components/tag/tag.ts

@@ -113,13 +113,15 @@ export class JigsawTag extends AbstractJigsawComponent implements OnInit {
      * @internal
      */
     public get _$realColor(): string {
+        let color;
         if (this.disabled) {
-            return this.disabledColor || 'preset-gray';
+            color = this.disabledColor;
         } else if (this.select) {
-            return this.selectedColor || this.color;
+            color = this.selectedColor || this.color;
         } else {
-            return this.color;
+            color = this.color;
         }
+        return typeof color == 'string' ? color : 'preset-gray';
     }
 
     /**