Extra checks

app/src/main/java/eu/faircode/email/AdapterFolder.java

@@ -185,7 +185,7 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
 
             if (listener == null) {
                 vwColor.setBackgroundColor(folder.accountColor == null ? Color.TRANSPARENT : folder.accountColor);
-                vwColor.setVisibility(account < 0 ? View.VISIBLE : View.GONE);
+                vwColor.setVisibility(account < 0 && Helper.isPro(context) ? View.VISIBLE : View.GONE);
 
                 if (folder.sync_state == null || "requested".equals(folder.sync_state)) {
                     if (folder.executing > 0)

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -602,7 +602,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
             // Account color
             vwColor.setBackgroundColor(message.accountColor == null ? Color.TRANSPARENT : message.accountColor);
-            vwColor.setVisibility(View.VISIBLE);
+            vwColor.setVisibility(Helper.isPro(context) ? View.VISIBLE : View.INVISIBLE);
 
             vwStatus.setBackgroundColor(
                     Boolean.FALSE.equals(message.dkim) ||

app/src/main/java/eu/faircode/email/AdapterNavFolder.java

@@ -92,7 +92,7 @@ public class AdapterNavFolder extends RecyclerView.Adapter<AdapterNavFolder.View
                             ? R.drawable.baseline_folder_24
                             : R.drawable.baseline_folder_open_24);
 
-                if (folder.accountColor == null)
+                if (folder.accountColor == null || !Helper.isPro(context))
                     ivItem.clearColorFilter();
                 else
                     ivItem.setColorFilter(folder.accountColor);