The Blizzard colors in DebuffTypeColor are a bit dim for borders.

I think ABA used to SetBlendMode('ADD') though it may also have used brighter colors.

Possibilities:

• run the Blizzard colors through rgbToHls -> bump luma -> hlsToRgb transformation at initialization
• do that once and just save it, Blizzard probably will never change them
• set the alpha higher than 0.7
• try different blend modes

First probably spend some time figuring out what it should look like. After that making it look that was will be easy.