Baby shower

Hi all!

I'm planning my sisters baby shower and I'm thinking a rainbow theme. My only concern is going over board and it ending up tacky. Has anyone had/ been too a rainbow baby shower before and have any tips so that it'll be cute and not cringey?

Edit: Yes this would be her rainbow baby.

Also she loves any and all things bright and colourful, so I feel like incorporating the fact it is her rainbow baby and her love of bright and colourfulness would be perfect.