Fiance wants to wear suit for wedding/tux for reception two different colors

I don't think this will impact anything so if that's what he wants to do I would let him do it.

If it was me and that is something my FH really wanted I would let him have it. I would figure out how to make it work. Beige is a neutral colour so it can work with the other colours.

Sure, why not? It's his wedding too.

Lots of brides change and they don't run it past the groom. He should have final say over his own attire just as you do for yours, as long as it isn't disrespectful.

It's his wedding too, let him wear what he wants.

I don't think it would clash.

Just to give you an idea of what it will look like.

Beige suit with white wedding dress

It is not unusual for men to change for the reception, especially if the ceremony is in the afternoon, when a tuxedo is not really appropriate. Tuxedos are evening formal wear for men. Given my druthers , I would suggest the suit for the afternoon and the tuxedo for the evening reception.

I do however think beige and brown are an odd choice for someone who likes fashion, when the groomsmen will be in grey.

I think that's super cool and will be great for photo diversity! Plus, it feels like he really wants to look good for your wedding which is romantic. Yes, yes, yes.

We both changed into different reception outfits...pirates. It was pretty rad.

It's his wedding too, unless he wanted like a lime green leisure suit I'd be inclined to let him go for it. My H was dead set on a tux even though it was too formal for our wedding...he loved it, I loved the way he looked in it, and it was fine.