Indian fam, so white is the colour of mourning (and also looks disgusting on me).
I'd probably go with either a red or some other jewel tone - maybe a dark green? Because emerald is my birth stone. With luck, my partner's birthstone would be a complimentary colour and we could incorporate the other's colour into our own outfit and it would be disgustingly sweet. (My general aim with a wedding celebration would be disgustingly sweet and happy and a little bit soppy, within reason). I have some traditional gold jewellery that my mum/dad will probably want me to wear (and I won't say no to because it's very sentimental and sweet and it means a lot to them), so the dress will likely have to work with gold... at the same time, I really don't want to spend more than £150 on a dress (I'm cheap af woops) so charity shops and getting things altered are definitely in my somewhat-distant future!
TL;DR - I am far too young to have thought about this as much as I have, especially since I've never had a significant other.