The one I got from Walmart is a dark gray color so it goes great with any decor and is light and easy enough for little ones to pick up and move around if they ever need to. It has rubber traction on the bottom of the legs.
Also, I just wanted to suggest to you that you can get rid of the potty seat that you put on the potty and let her try to sit on the toilet, holding herself up with her hands on the seat next to her. She'll get the hang out it real quick. I don't know how old she is, but it sounds like she may be able to do that already. No more worrying about what special kid potty seats to use after that. My daughter did even better at pottying once I got rid of the child contraptions, and now she slides onto the seat herself without a stool and just uses the stool for the sink. Good luck.