I'm doing much the same thing- painting some of my out-buildings in the yellow/brown scheme. [in fact I built a replica of the phone booth @ Big Horn to house my power service entrance] In Colfax, CA they're restoring the SP depot, and I used their color chips: Kelly-Moore #'s 00-1058-RV and 00-1059-RV. The RV is the code for the Roseville, CA Kelly-Moore store. If your local K-M can't contact the RV store, let me know. This may not be an exact D&RGW match, but I sure can't tell!