One tie is unlikely to go well with all 6 suits. Purple is least likely to go well with anything but the black. Yellow not good with stripes. Gray's pretty busy. Red is too, but it's not stripes, so better. I say red or black, but don't love any.
i absolutely love the paisly one, its so unexpected not only is it fashionable it will def be a good conversation piece. the red & black pinstrip are nice as well
I have a black pinstripe suit, a navy suit with a very fine olive pinstripe, a dark brown suit with a red pinstripe, a blue pinstripe, and a grey pinstripe, and a solid black blazer I would be wearing it with.