MAKE UP FOR EVER Full Cover Concealer, as the name implies, is a full coverage cream concealer with a matte finish. I'm (finally back) at NC35, and I use the shade Beige #8. It's more neutral than yellow, but I find that it works perfectly for my skin tone anyway.
It's a splurge at $32 for a 15ml tube, but a little goes a long way. The price is definitely well worth it because the tiny tube will last you f-o-r-e-v-e-r. You literally need the tiniest amount of this to cover my dark spots and acne scars. It's very pigmented, and it hides everything! And it's super long-lasting, too! Make sure you don't overdo the amount you put on because it might cake-up on you. Sometimes, during my (even) lazier days, I pop this on places that needs covering, and I head out of the door without using any foundation. It stays on really well, and does not oxidize even when worn alone.
If you fancy this, but can't justify the price I think these are good alternatives: Kat Von d Tattoo Concealer ($25), MAC Pro Longwear Concealer ($18) and Hard Candy Glamoflauge Concealer ($6).
What's your go-to concealer? :)