Upload your color images
For the color options you have, you can either let the smartness of the script provide a color for you, or you can upload an image that represents that color.
The way I have gotten my images from my products in my demo shop was to open each product image on my storefront in the “colorbox” (lightbox) and grab around ~ 55 by 40 pixels section of the product image, then save that small screen grab to my desktop, and rename the image.
Note: There's an important naming convention to respect here! The image must be named after the color option, but be handleized, and have a .png extension.
If you have a color called 'Déjà Vu Blue', then name your image deja-vu-blue.png
If your color is 'Blue/Gray', then name your image blue-gray.png.
If your color is 'Black', then name your image black.png.
Repeat steps 2 and 3 until you have uploaded all your images.
Let me if you are still not able to fix it.