[Chris Saper]

Shadow color is always a function of several elements: first, the local color; second, the temperature of the light (opposite) and third, the color of influencing adjacent reflected color, when applicable. Shadow color is never a darker version of local color, just as color in light is never just a lighter value of local color.

I can't really speak to the specific Unison colors, as I rip my little papers off the sticks as soon as I use them. The difficulty I expect that you are having, Beth, is working from a photo resource - which will not give you true color, especially in shadow; it would be much easier to judge if you were looking at the actual object under the light you will actually use in the painting.