Avatar defaults and colors

ts/util/migrateColor.ts

@@ -1,53 +1,15 @@
 // Copyright 2018-2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
-import { AvatarColorType } from '../types/Colors';
+import { sample } from 'lodash';
+import { AvatarColors, AvatarColorType } from '../types/Colors';
+
+const NEW_COLOR_NAMES = new Set(AvatarColors);
 
 export function migrateColor(color?: string): AvatarColorType {
-  switch (color) {
-    // These colors no longer exist
-    case 'orange':
-    case 'amber':
-      return 'vermilion';
-    case 'yellow':
-      return 'burlap';
-    case 'deep_purple':
-      return 'violet';
-    case 'light_blue':
-      return 'blue';
-    case 'cyan':
-      return 'teal';
-    case 'lime':
-      return 'wintergreen';
-
-    // Actual color names
-    case 'red':
-      return 'crimson';
-    case 'deep_orange':
-      return 'vermilion';
-    case 'brown':
-      return 'burlap';
-    case 'pink':
-      return 'plum';
-    case 'purple':
-      return 'violet';
-    case 'green':
-      return 'forest';
-    case 'light_green':
-      return 'wintergreen';
-    case 'blue_grey':
-      return 'steel';
-    case 'grey':
-      return 'steel';
-
-    // These can stay as they are
-    case 'blue':
-    case 'indigo':
-    case 'teal':
-    case 'ultramarine':
-      return color;
-
-    default:
-      return 'steel';
+  if (color && NEW_COLOR_NAMES.has(color)) {
+    return color;
   }
+
+  return sample(AvatarColors) || AvatarColors[0];
 }