What does "Fun Casual" mean?

I talked to a friend from my previous job and the attire at the wedding came up. She said that the bride - my former boss - wanted her guests to come in fun casual attire, with yellow, pink and orange as motif. Both my friend and I were confused with what fun casual meant so we both will be going in long, flowing dresses just to be safe. And since it is (sort of) a beach wedding, I guess it will be okay to wear slippers. She said casual, right? Slippers can dress down even the most extravagant attire. I think.

So I came up with these 2 pegs for what I'd want to wear to the wedding. Again, these are just pegs because the actual items cost more than everything I own. I am not being overly dramatic. A pair of one of those sandals cost 20 friggin' thousand pesos. I mean, really? ANYWAY...

So, what do you think? I am not a girly girl and I don't mix pieces well so I'm sorry if these are nakakaumay, at the very least.

How to do my hair and make-up, now that's a different story.

Note: I got the website Polyvore from http://heytherejillilah.blogspot.com.