Steve,
I personally reach for whatever color works. I like a warm Vermilion as it is a very useful color in warm skin-tones. When I have to ramp up the volume, I use a ripping cadmium. I think trying to dictate what pigments work and what are out of bounds is like telling a trained pianist what part of the scales is useful and what is wrong.
Thank-you for your information about the Cape School. I wish I had known about it, instead of going to The Boston Museum School.
I found some more about the Cape School. Interestingly Henche was a in a direct line of teacher from William Merritt-Chase the founder of the Parsons School.
He was influenced by the Japanese prints and arts and often incorporated it into the arts. It was this cross pollination of Asian art to the French that produced one of the most exquisite periods of art in history. Of course the French influenced the American Impressionist movement as they all went over there to study.
Here is brief description of Chase and the Cape school.
http://www.mcbridegallery.com/amerimpressionism.html
Below is a beautiful Chase incorporating Asian design into a beautiful painting.
Also is a spectacular Monet of his wife in a kimono. This is a really poor copy of that magnificent painting at the Boston Museum.