The first thing you need to know about mixing colors when you dress up is the "THE RULE OF 3"!!! For a look simple and chic at all times try to mix just 3 different color for all of your outfits. But you can wear 4 colors if one of the color you are wearing is white.
Now you gotta know your color! They is 3 different categories type of colors
Neutral Colors: Black, Grey, White, Cream, Beige, Tan and Brown
Cold Colors: Blue, Green, Blue tones of purple e.g. lavender
Warm(Hot) Colors: Red, Orange,Yellow, Pink and Pink tones of purple e.g. plum