How do I know if my foundation has pink or yellow undertones? In a place with bright, natural light, hold up a piece of printer paper and look at how your skin reacts to it. If your skin looks pinkish against the paper, you probably have cooler undertones; if your skin looks yellow against the paper, you’re probably a warm tone.
What does it mean if my foundation is too yellow? That’s what you need to do with your foundation/concealer. If it looks too yellow/orange, it is too warm. If it looks too pink, it is too cool. If it looks grey, it is too neutral.
Is foundation supposed to look yellow? If you’ve picked the wrong undertone:
If you are COOL and pick a WARM or NEUTRAL foundation, it will look yellow on you. If you are WARM and pick a COOL foundation, it will make your skin look pale and icy. If you pick a NEUTRAL foundation, it will look grey.
What color neutralizes yellow foundation? How to Use Purple and Blue Color Correctors. Purple and blue concealers help neutralize yellow and orange hues, as well as correct dark spots and hyperpigmentation and help tone down overly orange skin. (Think about those times you might have gone overboard with self tanner.)