I bought this online. It fit well but there was too much white - which didn’t seem so obvious on my screen. So out came my turquoise, pink & peach fabric markers. Quite bit of colouring later, mostly inside the lines! The ‘colouring’ has held up well.
What a great solution! I definitely like your version compared to the original. You’ve given me a new idea that I’ll tuck away for a time when I might need it!
Sharpies are my usually go to, too. A couple of times I used Sharpies, the colour bled, so given the bathing suit fabric, I used actual fabric markers.