matching colors, for homecoming/prom/etc Options

[purrfecto]

if you have a date for homecoming/prom, do you typically match each other? like for example, if you're wearing a red dress does your date wear a red tie or something like that? how many people do you know actually do this?

and for corsages/boutonneires, do they have to match each other as well? or if you get a blue dress, does it have to be a blue flower or can it be some other color? haha, yeah. i just want to know.