change varient pills from text to colours in sense theme

[Momero]

Hey i want to change the varient selector to the colour in stead of the name of the colour in a circulair form. I have tried following the instructions of many video's but this didn’t work because they were not made for the sense theme. My url is momeroshop.com 

Here is an example only with a slightly different form

I hope i gave enough information if not please let me know