Huda Beauty Ruby #4 is a slightly cool-toned, medium-dark red with a matte finish. It is a limited edition eyeshadow.
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Ruby #4 is a muted, deep red with subtle, cool undertones and a matte finish. The eyeshadow had good pigmentation but didn't seem to be quite opaque in a single layer, though it went on rather evenly despite having a slightly chalkier, thinner texture with a smidgen of dustiness in the pan. I felt like it applied and functioned better on the lid than it felt by touch or looked swatched on my arm. It lasted nicely for eight hours on me before fading noticeably.
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