Believe it or not, there is a lot of technical stuff that you should think about when it comes to picking that perfect pair of sunglasses. For one, your skin tone and hair color have an impact. Everyone has either cool or warm skin and hair tones. Cool skin tones are made up of pink or blue undertones and blond, black and light brown make up cool hair tones. Warm skin tones have a yellow cast and golden blond, brownish gold, red, black and gray. Choose your shades color wisely!