Four brown-hued shades of eyeshadow debuted in the Warm & Cozy Collection. On my skin (probably around NC20 for the underside of my arm — which is where I do swatches), they were all fairly faint. You can see the color, but they’re obviously not ultra rich in pigmentation. I don’t think that makes them bad necessarily, they’re just softer shades and definitely should be used in conjunction with a base (e.g. Cuddle shadestick).
MAC has a whole slew of amazing neutral eyeshadows in their permanent line-up. I don’t know if these would be the first browns I’d go-to, to be honest. I’d probably just check out their permanent range, because there really are some incredible shades available. (You can see my eight must-have MAC neutrals here.)