3-hour portrait

I intended to go a little bigger with this portrait than I've been doing lately (mostly I've been painting 3-hour portraits on 8x10's), so I gave myself plenty of space and ended up going a lot bigger, ha (can't quite seem to not fill the available space--I have this taped to a 16x20" board ;). This model had such fair, subtle skin tones, they were really difficult to translate. It seemed like every color I mixed was overstated in one direction--if I saturated the paint enough, the value was too dark, but if I made the value correct, the tone was too cool/chalky. I don't know what the answer is (probably should have at least pulled out the lead white), but I like getting a little painting practice from life in here and there. I was using a limited palette of titanium white, cadmium red, ivory black, yellow ochre, and raw umber. And I'm thinking I should pull the raw umber out (or use a warmer or less green/purple leaning brown). Also probably wasn't using enough paint. Spread a little thin over this large a surface (which would be fine if the plan was to paint another layer, but this was a one-night thing).

I was reminded of this passage of Ruskin I read the night before:

"All fine coloring, like fine drawing, is delicate; and so delicate that if, at last, you see the color you are putting on, you are putting on too much. You ought to feel a change wrought in the general tone, by touches of color which individually are too pale to be seen; and if there is one atom of any color in the whole picture which is unnecessary to it, that atom hurts it.Notice also that nearly all good compound colors are odd colors. You shall look at a hue in a good painter's work ten minutes before you know what to call it. You thought it was brown, presently you feel that it is red; next that there is, somehow, yellow in it; presently afterwards that there is blue in it. If you try to copy it you will always find your color too warm or too cold--no color in the box will seem to have an affinity with it; and yet it will be as pure as if it were laid at a single touch with a single color."