Typically, cool skin tones match cooler hair colours, like a platinum shade, cool brown, or ashy hue. Warm skin tones, on the other hand, are complemented by warmer hair colours like golden brown or blonde, bronze, and copper-red hair dyes.

Can You Dye Hair When It's Greasy? Following up on the information we just shared, you can dye your hair when it's greasy, and it actually benefits your hair and scalp. The natural oils coat the hair and scalp, which can lead to less hair damage, and it can reduce the risk of potential scalp irritation.

Timing. Timing is 30 minutes for standard color application; 45 minutes for maximum gray coverage and for high-lift shades. Typically, with permanent color, the first 15 minutes provide time for the peroxide and ammonia to open the cuticle and penetrate into the cortex to lighten natural pigment.

A: The frequency of coloring to cover grey roots varies, but a general guideline is every 4-6 weeks. However, this may depend on the speed of your hair growth and the type of hair dye used. Choose a root touch-up product for a quick fix between full-color applications.