Colors the chatselector in the chatcolor (#3960)

Co-authored-by: Paul <ritter.paul1+git@googlemail.com>

Content.Client/Chat/ChatBox.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;
@@ -454,6 +454,7 @@ namespace Content.Client.Chat
             {
                 SelectedChannel = toSelect;
                 _channelSelector.Text = ChannelSelectorName(toSelect);
+                _channelSelector.Modulate = ChatHelper.ChatColor(toSelect);
                 return true;
             }
             // keep current setting