I encountered an issue with my players last night wherein they entered a (dark) temple that is, by and large, grey-colored. They moved around the entry area and were quick to point out that something was wrong with dynamic lighting. They weren't quite right. The issue is that AFoW on maps with grey floors means is that players can no longer see what is illuminated by bright light or dim light, or is, in fact, AFoW. The problem was remedied after the session by turning off AFoW completely, but for now it is virtually incompatible with maps largely made up of a grey background. Although by default it is fine most of the time, It would be sensational if we were able to change the color of AFoW in the page settings as you can select a color that contrasts with whatever environment your players are in. If you would like to observe this in action I would happily provide the game/page.