To avoid the most *unflattering* lip colors, it helps to know which work best for your tone, Bychkova advises, and sticking to them. She offers the following quick guide to refer back to if you're ever lost, trying swatches for the umpteenth time and/or need assistance when picking out the right product for your undertone.
Fair or light skin with warm undertones: Bychkova says to try lipstick shades in "warm pinks, coral, peach, or nude beiges with a warm, orange-y undertone."
Medium skin with warm undertones: "Deeper peach and coral shades would work perfectly for you!"
Medium skin with cool undertones: Deeper shades of rose and mauve "look best," and she says to "try experimenting with cool undertone berry hues."
Tan skin with warm undertones: Bychkova suggests "considering nude shades with touches of peach, warm brown, or caramel." As for the brights, try cardinal and candy apple red.
Dark skin with warm undertones: She says to "Go for deep, dark, warm browns."
Dark skin with cool undertones: "Think ruby red and deep, cool plums," Bychkova concludes.