Real World Comparisons:
Strawberry ice cream
Amazon River Dolphin
Scars & stretch marks
Shades of Pink:
Rose, Carnation, coral, puce, blush, fuchsia, salmon, albino, hot pink, rose, china pink,
Make every detail count
Colors are powerful descriptors, not fillers. Make sure that if you use a comparison or contrast to highlight a color, you choose the right one. Look at the setting and atmosphere you are working to create, then draw from the viewpoint character or narrator's history, education and past experiences to find the right fit.
A poor example:
Betty probed the boil at the back of Harvey's neck with her nail file. "I dunno, Harv," she said between snaps of gum. "It's pretty nasty, all right. You should go see Doc Barrows. Looks like there's a damn kid's eraser growin' out of your skin."
What's wrong with this example?
I think the tone is right, but boils are round, not rectangular, and probably the color would be a bit more intense.
A strong example:
Betty probed the boil at the back of Harvey's neck with her nail file. "I dunno, Harv," she said between snaps of gum. "It's pretty nasty, all right. You should go see Doc Barrows. Looks like there's a damn radish growing back here."
Why is this example better?
This gives a clearer image of a swollen growth and is higher up on the EW factor.