I know how to place a new image in the CN1 Designer, but in the case of components like Check I need to change the background color only of the check and from what I understand this is achieved by changing the image.
I tried to modify the UIID and the results were not good.
1. How big should the new image be (I imagine it should be png)?
2. Can you download the current image that is in the theme to be able to manipulate it in an editor?