Maybelline Knockout is a moderately warm-toned, light-medium pink with a metallic finish. It is a limited edition highlighter that retails for $9.99 and contains 0.24 oz.
Maybelline Knockout MasterChrome Metallic Highlighter ($9.99 for 0.24 oz.) is a cooler, medium-pink base with a strong dose of gold shimmer. The effect of the warmer shimmer against the cooler base color made it appear like a two-in-one product when applied, as if I had applied a blush and then added highlighter on top. It was intensely pigmented where a little went a long way, and I'd recommend using a lighter hand to pick up product as the powder was soft enough that over-application could be a concern. The consistency was soft, almost cream-like when applied to my skin, and blended out with ease without emphasizing my skin's natural texture. It stayed on well for eight and a half hours on me before fading noticeably.
This restocked a week or so ago, but it appears to be gone again--not sure if it'll be restocked again or if you might have luck finding it in stores. I wish we saw shades like this more often, though--it's harder to dupe because of the more distinctive, cooler-toned base.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.
What's happening now? The chrome effect. Now, skin heats up with a warm metallic sheen. This Maybelline FaceStudio Master Chrome Metallic Highlighter is infused with metallic pigments that create a reflective finish.