[enh] Overview: fork colors no more gray

src/components/ForkNode.vue

@@ -48,8 +48,8 @@
     uid = ''
 
     get bgColor() {
-      const rgb = Math.min(240, 90 + this.forkLevel * 10)
-      return 'rgb(' + rgb + ',' + rgb + ',' + rgb + ')'
+      const rgb = Math.min(240, 90 + this.forkLevel * 4)
+      return 'rgb(150,180,' + rgb + ')'
     }
 
     async mounted() {