The RadFormDecorator decorated checkboxes in the Grid are hard to read when checked in the following skins:
BlackMetroTouch, Bootstrap, Glow, Metro, MetroTouch, Office2010Black, Telerik, WebBlue

Screenshot with Telerik Skin:
https://www.screencast.com/t/1P2hyvWNX

Steps to reproduce:
1. Open http://demos.telerik.com/aspnet-ajax/formdecorator/examples/formdecoratorandtelerikcontrols/defaultcs.aspx?skin=Telerik
2. Scroll to the Grid
3. Select one or all checkboxes
Result: The selected color of the checkbox almost matches the background color