Hello Sergiy,
In Prestashop administration, when you add an attribute and you select type "color", you can add a texture to this attribute.
Then you can select this texture from your computer.
I've done some caps:
http://www.subirimagenes.com/otros-atributs02800-8452165.html
http://www.subirimagenes.com/otros-atributs02800-8452167.html
It would be great to have this option in your software.
Thanks!