I was a lifeguard and swim instructor in high school and college, and I can confidently say the brighter the swimsuit the BETTER. This helps your child be seen underwater vs. a blue suit.
This runs 12m-2T and has sleeves for extra sun protection
Toddler Girls' Long Sleeve Solid Colorblock One Piece Swimsuit - Cat & Jack™ Pink
Two Piece Swimsuit - Also comes in a fun Tropical pattern that's bright 12m-5T