There is are instructions here https://xtrackcad.groups.io/g/main/files/Trains/3_step_Instruction by member jr_rail. That show you how to create loco/rolling stock using the graphic drawing elements of Xtrkcad and conversion into a carproto object, so you should be able to apply different colors to the graphics elements.
Updated the HO Kato file )located at https://xtrackcad.groups.io/g/main/files/Dwyane%27s%20FIles) . All component descriptions verified on Ubuntu 24.04 and Win 10 to display properly. Recommend closing this request..
This should be right now
Can you provide your layout file, so I can see what your seeing
HO-Atlas Code 100 Track.xtp Discrepancy
Corrected param file attached
HO-Atlas Code 100 Track.xtp Discrepancy
I believe this has been corrected in 5.3.0Beta1. As all field and buttons show in beta1. See bug 530.