Look at your veins inside your wrist. If they look green then you probably have warm undertones but if they look blue then you most likely have cool undertones.
Your natural hair and eye colors are also helpful. Those with cool undertones are likely too have blue, gray or green eyes with blonde, brown or black hair. Their hair usually has a blue, silver, violet or ash undertone, which is the color you see in the sunlight. If you are warm-toned then you probably have brown, amber or hazel eyes with strawberry blonde, red, brown or black hair. Their hair may have gold, red, orange or yellow undertones.
If your skin turns golden-brown in the sun you're warm-toned, while cool-toned skin tends to burn. Obviously, a fair-skinned person will burn but interestingly, a medium-skinned person who is cool-toned will burn and then tan.
A woman who looks better in silver jewelry is likely cool-toned and a woman who wears gold jewelry well is probably warm-toned.
If you are neutral-toned you look better in neutral colors. (easy to remember!) However, you fall more into either the warm or cool-toned category. Your skin, eyes and face will look better in bright white and black hues if you have more cool undertones. If you look better in ivory, off-whites or brown shades then you have mostly warmer undertones.
If you are warm-toned, you look best in earthier colors and colors on the warm side of the color wheel such as red, orange, yellow brown and pink.. Someone who is cool-toned will look best in richer colors and colors on the cool side of the color wheel such as blue, purple, green and gray..
STYLE TIP: I get to know every client's skin tones during my consultation with them prior to styling them. However, this is simply a guideline to make better decisions in providing my services. You may have colors that will always look best on you but a great stylist will be successful at creating a look that uses colors that don't typically work with your skin tones.