I lost my particular pix, but I did the same thing with a Model 38-2 and a model 640, but only the cylinders and yokes. There are a couple of others on here that have done something similar. The Model 38 was produced in "two-tone" as a special run for the Michigan State Police, but one can build his own cross-breed. Nowadays...the modern term may be "duo-tone", or something sounding scientific.
I have also heard about shooters that like to use the carbon steel blued cylinder for range shooting. I rather think one may be splitting-hairs over the slight difference in coefficient-of-expansion between carbon steel and stainless steel that may affect accuracy.....but to each his own.
I like the idea of making a gun your own.