Photos are notoriously inaccurate as explained in the forward. If you want to model fresh out of the paint shop at ALCO or a New Haven inhouse repaint then use the book. Some people do not care for weathering of any sort. Green bodied units. Gold even by the RR as it was yellow.
Gold is very dark and rich.
Refer to the Shoreliner article 'The Era of the Stripes' for more detailed information.