COLORS, PATTERNS, AND FLARE.
I suggest a natural, earthy, or muted color palette. Bright colors can be distracting and not complementary to skin tones. White and black often work well. I suggest solids, but as someone who lives in my striped overalls and band tees, I get the desire to have a little fun. Flannels, floral dresses, quilted coats all could be great - but coordinate with your partner. You’ll want to make sure you’re both dressing for the same season and that your colors are complementary.
I suggest bringing 2-3 options. If your outfit is simple, you could add some flare with jewelry, hats, scarves.