Red, hands down.
In the first experiment, men who viewed a possible conversation partner in a red (versus a green shirt) chose to ask her more intimate questions. In the second experiment, men who viewed an possible interaction partner in a red (versus a blue shirt) chose to sit closer to her.
Men wearing read will increase their chances of having an intimate conversations with women and they are more likely to sit closer to you.
In another study:
“In a series of seven experiments, researchers demonstrate that women perceive men to be more attractive and sexually desirable when seen on a red background and in red clothing.”
Unfortunately, these studies were done on heterosexual pairing and not homosexual. However, since both sexes are equally turned on by the color red, this should work for homosexual too. So next time you go out on a date or a bar, try wearing red! It won’t hurt to try 🙂