The two-color bind-off allows you to tie in both colors of a brioche, colorwork, or striped project in your bind-off. Here's a tutorial!
Learn more and get a step-by-step tutorial: https://www.interweave.com/article/knitting/how-to-two-color-bind-off/
Be careful to keep your tension very loose while working the two-color bind-off. Since you are stranding the yarns behind each stitch, there is a tendency to make this bind-off tight. Especially if you’re binding off brioche knitting, keeping a very loose tension will let your bound-off edge match the width of the piece.