I changed the colour in the UI code in my server for the character/summons so that the damage shows up in the floater bar overhead as red instead. Just me, but I think it looks cool, and super quick to do to each. I think its line 8 for each in UI:

<ProgressBar id="progressBar" height="90" width="590" showPercentageText="false" color="#FF0000" percentage="100" fillImageColor="#657B9C">

FF0000 is red