you'd need to pretty much color all of the blue squares in your colormap.pcx a similar value of yellow.every blue texture you see will end up yellow tho, and there's not much you can do about it.
every blue texture you see will end up yellow tho, and there's not much you can do about it.
It would be easier to ask R1CH (or whoever maintains your client of choice) to add a console variable for the rail trail color.