desperately looking for a visual to add cosmetic colored box

[Tomberry]

I remember using an addon in vanilla the allowed me to create square boxes.

They were usually on the background of the UI, you could chose their size, their color and transparency.

Their use was purely cosmetic and I can't for the love of me remember what addon it was.


Any help would be much appreciated.

Best regards

Tomb.

[cyklon]

DiscordArt