I've tried to take on board what Mark was saying about using a margin for the icons I also found that with the amount of colours I've been testing out it's actually maybe a better idea to just use 2 colours for all of the icons. At the moment I'm going to use these 2 colours til I've finally finished the visuals of the icons. I think I'm probably going to use either this pink/red or a bright orange as the main colour just because of the contrast with the colours of the map and because they are colours taken from coral reefs. The lighter colour inside is the blue of the ice in replacement of white.