Cool Undertones
The best way to tell if you have cool undertones is if your veins are more blue than green. Colors that work well with cool undertones include emeralds, deep purples, lavender, pink, and bright blues. Silver jewelry also tends to look well on cool undertones.
Warm Undertones
The best way to tell if you have warm undertones is if your veins are more green than blue. People with warm undertones tend to tan rather than burn in the sun. The best colors to wear with warm skin tones include greens, browns, dark yellows, and warm reds.