Black Tie
Black tie does not mean you have to wear only black! It's generally more formal attire, for men its tuxedos and suits and for women longer or floor length formal dresses. I have a Pinterest board if you would want some visuals: https://pin.it/4OTtWBDw1
Green and blue, but guests are more than welcome to wear these colors as well
The wedding is adults only
Anything but white is great! You can wear white but you might accidentally get red wine spilled on you