This tips will help you maximize your colour combination.
Contrast is key. Light top, dark bottom, light shoes. Dark top, light bottom, dark shoes. Contrast is needed using all three.
Avoid tops that are too close to your skin tone. It makes you appear pale and washed out. Read this article for a more in-depth explanation.
Avoid tonal outfits like a plague (all three pieces being the same color, or close in value).