Right now there is not a way to remove/change the icon resources. But we can look towards lightening them up a bit. Right now those colors match all the marketing branding for the product, so that may take a little wrangling. One of our OEM customers has a request to allow customization of one of the editor context menus (adding icons for commands that the OEM adds to our menus), so we may be able to make a more "generic" solution that would allow for easier customization or removal of icons.