Hi Chrissy
These are simply images used. So sure. You need to first
locate the image you wish to change. Then edit that image with an
image editor to make it your desired color. Then, in the Skins
Editor, you point at the desired image.
RoboHelp HTML already includes several Book and Page icons
you are probably unaware of. If you look in this location:
C:\Program Files\Adobe\Adobe RoboHelp
7\RoboHTML\Gallery\Images
Cheers... Rick