Yay, grimey gusses!!! Yes, they look good. Nice work with the grime, soot, and rust! You're dead-on right about that very slight touch of orange in the yellow. The blue and yellow scheme was originally adopted by the C&O because those are WV state colors. Actually, the state colors are blue and gold, but since you can't "paint" gold, the yellow has always had a slight tint of orange to give it that sort of golden glow in the right light. Well, ok, ya'll are right... there were some paint schemes (particularly in the Chessie era) that lost some of that orange tint and looks almost pure yellow, but as everyone can see, CSX went back to the orangie tint.
I'm glad you like our shade of blue:
http://www.shca.com/west-virginia-capitol-dome/The gold leafing on the dome is not the original gold. When the building was completed, it was guilded; however, the leafing peeled off. The dome was repainted with West Virginia Blue amd Gold colors. In the 1980s, the dome was guilded once again.