I use the darkest for my redhead eyebrows. Goes into eyebrow without looking drawn on skin. Stays all day in eyebrows and on eyelids. Blends well.
I really love Covergirl and their makeup line and these colors are vibrant and elegant. The only downfall is that its not very long lasting and fades relatively quickly. Its better to use a primer and really layer it on but its chic and lovely.