Blue Commander tag doesn't show up on my client

So it's taken me a while to realise this, but for whatever reason the classic blue Commander tag won't show up on my client at all. It won't show up when other people are using the tag, it won't show up if I have the tag, and it doesn't show in the options for colours and styles.

My selection menu: https://imgur.com/a/rA7aOSB

At first I thought the blank spot in the selection area was just to have an invisible tag, but then when people started following me and asking what I was tagged up for it made me realise that the blue tag is completely invisible to me. NO other colours have this problem, and I can even see the classic blue in the Catmander style, but the normal one just will not show up for me.

I've tried -repair ing, but that's done nothing to change it at all.