ISO Attire recommendations

any advice on what to wear to a wedding this weekend? Bride’s dress code for guests is dressy casual, mostly bright colors, no blacks or greys. Unfortunately my closet is mostly black and grey, and what isn’t doesn’t feel appropriate. I am a female and it should be pretty hot. I am looking for either a dress or jumpsuit. Nothing backless so I can wear a bra. And something I can easily move around in. Tyia