This is not my first wedding, can I wear white?

Of course you can wear white!
Ladies, let me give you a little history lesson. Couples would only get married to join LAND, MONEY, or POWER. When the bride's father "Gave her away". Literally the bride would be given to the groom as a payment of some sort. The veil being lifted from her face, by the bride's father, would be the first time that the Bride would formally meet the groom. "As the father gave the Bride away". If that bride wore white, then her family was very rich. Only the wealthy could afforded the be able to purchase white satin or silk. Only wealthy people could afforded lace and seed pearls. Only the very wealthy could keep white garments clean. So they had a lot of money.
In in some cultures the bride wears red for good luck, Some a rainbow of colors.
In todays society, if you want to get married on the beach and wear bathing suits, go for it. If dressing in county and western is your thing have at it. White can be a symbol for a new beginning. So, make a fresh start. Don't feel afraid to wear what ever color you want to. It doesn't tell you who you are, but it could say, we are starting a new life together. Just remember that a wedding is a celebration. If you are not going to be formal, and traditional then what ever you do you must be FUN, just have a good time.