GMOD TTT Colour Gradient for chat addon

Hey i’m using a addon that allows me to set custom colours for different ulx ranks.
Currently i use “<hsv>Super Admin</hsv>” to provide a rainbow effect. However i would like a gradient that goes from red to yellow and back.

(This is an option from within the addons interface, i could not find anywhere that could help me on this)

Any help is appreciated.

You’ve given us no information that we can use to help you.

Consider sharing some code or at least what add-on you are using.