Fix default conversation color overrides

ts/util/getConversationColorAttributes.ts

@@ -0,0 +1,37 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { ConversationColorType, CustomColorType } from '../types/Colors';
+import type { ConversationType } from '../state/ducks/conversations';
+
+export function getConversationColorAttributes(
+  conversationColors: Pick<
+    ConversationType,
+    'conversationColor' | 'customColorId' | 'customColor'
+  >
+): {
+  conversationColor: ConversationColorType;
+  customColor: CustomColorType | undefined;
+  customColorId: string | undefined;
+} {
+  const defaultConversationColor = window.Events.getDefaultConversationColor();
+
+  const conversationColor =
+    conversationColors.conversationColor || defaultConversationColor.color;
+  const customColor =
+    conversationColor !== 'custom'
+      ? undefined
+      : conversationColors.customColor ||
+        defaultConversationColor.customColorData?.value;
+  const customColorId =
+    conversationColor !== 'custom'
+      ? undefined
+      : conversationColors.customColorId ||
+        defaultConversationColor.customColorData?.id;
+
+  return {
+    conversationColor,
+    customColor,
+    customColorId,
+  };
+}