Keep it simple - as best as you can, I know this is big deal!
Neutral tones, blue's, white's, a summery dress, dress shoes, no shoes... it can be what you would like it to be. This is your moment!
Wear something that makes you feel good about yourself. For your partner... since it will be a surprise most likely... pick something out, give hints, make up a theme.
The only thing I should shy away from is crazy patterns and loud colors!
Check out some samples from previous proposals.
