My hot tip for next season is the cream or ivory tux. I picked mine up for a jaw dropping £40, reduced from £310 from the Theory store at Bicester Village last month, so feel quite pleased with myself.
Otherwise Net a Porter has a great selection. There’s Diane von Furstenberg’s cream satin-trimmed wool-blend version for £380 ($425 in the US)
This isn’t a tux, but for a more lightweight riff on the cream jacket, I really love Isabella Oliver 365’s ivory crepe de chine jacket, which is an amazing £74.50 in their sale.