u/TheSkyIsAMasterpiece

I was looking at German short row heels. I like the technique. But, half way through you knit 2 full rounds. I wanted to do the heel in a contrast colour and don't want that colour on the front of my sock. Can I just use my main colour at the front of these 2 rounds? Is there a different trick or is this not the heel for this project? If it's not the heel, what would you suggest?