Ok, I know a beach ceremony is considered a little more causal and khaki's on the guys are acceptable, but I really want the guys in black suits and pink ties to match the girls in black dresses and pink sashes. My dress is below, it's a floraly pink dress. I'd like my groom in a black suit and not sure what color tie...black? Pink? Not sure, maybe you gals can help...I'm not a fashion Diva, I'm a fashion disaster.

Is it ok to have to have this type of attire for a beach wedding? I didn't want to do Tuxes, I think that's a little to formal for the beach. The reception will be on a riverboat and the date of wedding is September 8th, 2012.
Suggestions would be much appreciated as I have changed the color of the girls dresses from pink to black over and over.

Oh,this is my second and his first wedding....
Thanks!