Red exclamation mark - nearly invisible to colorblind users!

Idea created by 1_david.askov on Oct 27, 2011
    What I see:

    What my co-worker sees:

    I was trying to teach one of my (color impaired) systems administrators to diagnose basic mapservice errors. We had a layer with a database connection error, and I pointed out the red exclamation mark in ArcMap next to the layer. His response was "what red exclamation mark?!?!?"

    It is so close to the checkbox that it doesn't stand out, and only the red color really leaps off the screen to me. He doesn't see that at all. If you could give it some separation from the checkbox and maybe a more visible clue (asterisk?), that would help.