If you are using omp hud just straight up copy replace of clientscheme + menu files should be enough.

If not, you need to define "SegText" color from my clientscheme into your scheme in colors section, also font 13 for Segoe (at the end of file) and from section "omp fonts" first few fonts starting with capital S (S16,14,10,5).

KNOWN ISSUES :

if you have -console in launch options, i'd recommend to remove it. Because there is no way to define where console window appears - it interferes with main menu. it doesn't bother me much, but i know it might bother few people.

Unfortunately, same thing happens with server browser menu. It shows in center of screen every time, so if you have it set up to be high, it will interfere with menu.