Don't worry, I'm with you on this one. I spent a good few hours in discussion with several people before painting and attaching my eyelids. I had many people say to make them black and only a few that said to colour code it. Of the few that said to colour code it, they changed their mind once it was attached. There were 2 primary reasons they all had for why it should be black, bearing in mind that these opinions were based on the Sportivo: 1) It creates symmetry. When you look at the bottom of the Sportivo bumper, you have it split into three 'highlighted' areas. A black trim around the centre radiator opening, and a black trim around each fog light. Then on the top you just have a black section where the grill is (more bold with a mesh grill). By attaching the eyelids and having them black as well, you add a black 'highlight' to each of the headlights. This creates that same three-part layout you have on the lower part of the bumper. It then looks a little more even now. 2) With the eyelids painted body colour, when you take a step back it will partially blend into the bonnet. It isn't as noticeable that there is something unique about the headlights. When they are black, it grabs your attention more and you definitely see it as something unique to the car. Once again, these are personal opinions and some others see things differently. I also had a third reason and that was because I like the look of black when mixed with red, but that's just me.