"Skin undertones" refer to the underlying colors present in our skin, which can affect how it appears. It helps determine whether our skin has warm, cool, or neutral tones. Full definition
Its undertone is neutral, leaning towards cool, which actually complements warm skin undertones instead of clashing. (layow.com)
The blush has a cold pink color, and I thought it'd just work for cool skin undertones. (sewhistorically.com)
This rich shade of brown is warm without crossing over into reddish territory — as so many warm brown shades do — making it super-flattering on all different types of skin undertones. (goodhousekeeping.com)