Hey everyone, I would like to change the button select color of a specific page on my website. Right now whenever I select a size, the button does not change color at all. Basically, whenever I select a size, I would like the button to change to a purple background with black text if that makes sense. I have attached a screenshot below for a better understanding of what I am talking about. I would like it to change on both desktop and mobile devices. Thanks in advance!
Screenshot:
