There is no particular color that should be avoided when selecting a faucet for a stainless steel sink. However, it's typically advised to pick a faucet finish that blends in with your stainless steel sink and the room's decor as a whole. Nevertheless, some finishes or hues might not complement a stainless steel sink as well as others. For instance, some individuals could think that a black faucet is too daring and doesn't go well with the stainless steel sink's silver tone, while others would think it creates a dramatic contrast. In the end, choosing a faucet color is a question of taste and should be guided by what suits your room the best.