Hello,
Thank you very much for choosing our theme and for contacting us.
Our theme has the option to configure swatches.
Please navigate to Dashboard -> Products -> Attributes -> Color -> Configure iterms, enable swatch as shown http://prntscr.com/jskm29 and add the colors to the items
Navigate to Theme Settings > Shop > Attribute swatches > choose pa_color (your color attribute) to show the swatches on the product grid and enable “Use images from product variations” if you want to replace colors with images
Make sure each variation in a variable product has an image: http://prntscr.com/kk870w
Best Regards