We love creating mood boards! Color themes are very common these days. A pink wedding is ideal if the bride is super princessy and girly! Its so sweet and romantic. Whereas a monochrome wedding adds a vintage vide and its super classy!
A two color theme can also be interesting but its important to pick the right color. While red and green would be a little too festive unless your wedding is on Christmas day, consider using complementary colors to create a color blocking themed wedding!