Ivanhoe, Rick, there's only a very rudimentary painting guide provided on the bottom of the last page which lists three colors as A-B-C for Tamiya and Mr.Color paints. The colors are called out as A: XF-11 Chrome Silver, 8/H8 B: XF-10 Gun Metal, 214, and C: XF-70 Dark Green, 123. The only places where those call-outs are used is with the engine compartment pieces, so it's not a lot of help there I'm afraid.
Interior color shots of the Pz 38t are hard to come by, I used the Pz Tracts no. 18 but the photos there are black-and-white (and also a bit doctored as they used a Slovak LT-38 for the manual photos) but that's the best references I know of.