Is it normal for half of finger nails to turn purple near the cuticle, when cold, or is this reynaud's?

Possible Reynaud's: Reynaud's phenomenon is a circulation problem that can cause the nails of the fingers and feet to change colors, the feeling of them being cold, as well as accompanying numbness or tingling upon rewarming. With exposure to cold temperature, classically the nails will turn white, then blue/purple with numbness, and then red with possible swelling and throbbing as the circulation improves.