I believe you need to buy yellow and white hex mosaic tile, and carefully plan the positioning of the flowers, then meticulously instruct your installer to do it the right way.

no clue but I love that yellow

A good DIYer that has experience with tiling should be able to do it but honestly the whole daisy thing looks very juvenile to me. Btw in showers the best is fewer grout lines not more and I never understand the reason to high lite the space where you store shampoo bottles.If you must do this I would stick with the black and white if you are ever planning to sell.

Black and white daisy if you must, paint the walls yellow, or buy towels, soap dispenser etc in yellow. You shall thank yourself : ) in a couple short years. Even then, I would refrain from more than shower floor with a scattered daisy. Add a framed photo yellow daisy........