Summer people are those who have a cool skin undertone with light-colored hair. Cool pastels as well as vibrant colors in cool tones look good on Summer people. Excerpts from Beauty and the Bath (the bold print emphasizes what I believe are good points to remember; italics are my own notes):
Your color palette for summer is delicate, soft, and light, including delicate pastels. You will find examples in the seasonal colors used for Easter.
The brighter colors such the strong bright yellows are not in your palette, choose yellow as a light pastel instead.
Your best complimentary colors are pink, light blue and light gray.
Blue Your color territory is most of the blues, remove only the royal blue or Chinese blue shades that a Winter season would wear. (See my note below)
Gray You can wear grays from light blue-gray to any soft charcoal blue-gray
Blue-Greens Blue greens can range from pastel to deep.
Pink For pink you can wear all the pastel pinks that have a blur undertone. You can also wear the deeper rose tones, which includes fuchsia, but even these may look best on you when powdered and muted.
Red Choose red as you will choose gray and green, reds that carry a blue undertone.
Watermelon Your shades of watermelon will be the most flattering when going towards more of a coral hue.You will want to avoid orange red and orange.
Lavender You can wear anything in the lavender family, the orchids and mauve pastels.
Plum, Burgundy, and Raspberry You wear these shades well, but if you are a Summer that is more on the fair side try to keep a softer shade near your face.
Yellow You should wear only one shade of yellow, the light lemon (see my note below) and you should avoid any yellow that has a gold undertone.
Aqua Aqua should stay in the light to medium range.
Soft White Soft white containing no yellow is your best best white,this shade is often called winter white. (Meh. Summers often look good in pure white. The only exception is super-pale, light-haired Summers.)
Navy The strong navy of a winter season, is not for you, choose instead a navy that is softer and grayer, this will compliment your softer complexion.
Beige/Brown Your beige and brown always have a brown tone. Wear any shade between your rose beige and rose brown swatches, including cocoa, but avoid yellow-beiges, gray beiges, and dark browns
Meh. I disagree with some of this analysis because it goes overboard trying to force Summers into the light shade of the spectrum. While these shades often look better on Summers, Summers can also wear vibrant cool colors like pure turquoise, fuschia, neon yellow, lime green, etc.
I have yet to see any black women who are Summers. They would have to be a cool undertone with natural blonde hair that is ash blonde or white blond in tone. If I see any, I will of course include their pictures here.