rule nr.1: contrast-nuance-repeat. Means:
a) use one color what is contrast to another (there are many kinds of contrast - read Itten or #askme).
B) Use third color what would be a nuance to the first or to the second color.
C) repeat one of a colors
Consider the amount of a bright ones should be decreased;)
Rule nr.2: uniting the colors.
Now you need to have one piece in your look what would have each of the used colors.
Applies to all of us if not only you are a blond wearing all-beige or afroamerican in all black and you need it acc.to your style+colortype+color image;)
Applies even guys;)
PS I do plan also the style courses IRL/on-line so we'd have enough of time to find your individual way of dealing with colors;)! PM me for the more details!