Non slip bathtub appliques are available in a wide range of attractive colors, patterns and prints. You can easily find one that matches your bathtub. If it’s used by children, then you can pick their favorite toons or movie characters or oceanic creatures like fish, squids and shells.
It is recommended that you pick bright or contrasting colors if you have elders and kids at home. It makes it easier for them to spot the applique and place their feet. Else, you can pick neutral colors that will be almost inconspicuous.