Color Remapping Guide
Color remaps are the ability to make playermodels use the topcolor and bottomcolor changes in the multiplayer tab and is more powerful than DM_BASE method. This will also work for HLDM models.
I am also posting this because as of the recent Sven Co-op update version 5.13 there was an update to allow any model entity or NPC that has remap textures to be controlled via "topcolor&bottomcolor" keyvalues using ranges 0~255. This allows for wide variants of models without needing additional skin textures (adding to filesize) or multiple models as some people have done just for reskins.
While this video tutorial was originally written for just playermodels, the same methods apply for NPC/other model textures only without needing a portrait.
Also don't forget you can also have "topcolor" & "bottomcolor" changed by things like "trigger_changevalue" as ive tested. Lastly P2MV model viewer can preview Remap_ textures.