https://store.steampowered.com/app/1105010/Coloring_Game__The_Family/
We are currently going full force with preparing the Expansion Pack No.2 in order to release it in due time. This is why the update 1.4.0 is postponed till early August.
The update 1.5.0 will not feature the opportunity to change the color palette (such an option has proved to be rather difficult to implement) but it will enable you coloring your own images. This option is going to be added to the free base game. Depending on the demand of this tool we will further decide on the possibility to elaborate the fully-fledged Workshop.