Do our wedding bands have to MATCH?

Hi hi ESB,

I have a question that's not veil or drama related.

I love my engagement ring. It's a white gold solitaire with a marquee cut diamond, and I love it. Now that we're getting closer to the wedding, the subject of wedding bands has caused some unease. My FH wants a plain yellow gold band, and isn't budging from that. I don't want my taste to make him wear a ring for the rest of his life that he doesn't at least like.

Do we have to match? Will people still know we're married to each other if we don't?* Is there a nice way to coordinate without my engagement ring and wedding band clashing? Or does it not matter at all and we should just tell our photographer to skip the three-rings-on-a-clever-background picture?

Thanks thanks!
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*there's an episode of House where he figured out an older couple weren't married to each other because their wedding rings didn't match.

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I'm a big fan of matching wedding bands. I think it's cool to see his-and-hers* rings on a pair of people that, you know, go together.

But do you HAVE TO match?
No.

Will people still know you're married to each other?  
I DON'T KNOW. Maybe you should wear name tags so it's perfectly clear to everyone at all times. "HELLO, I'm X's Wife."

If you coordinate the style of band, for example, if he gets a man-sized round band in yellow gold and you get a ladylike round band in white, I think they'll go together well enough.

(Classic Milla Round Band by Bario-Neal)
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*Or hers-and-hers. Or his-and-his. Obviously.