Huh. It looks like the color palettes are based off the Old Gods we have faced so far. The white and red is obviously G'Huun, the lighter pink with orange eyes is N'Zoth, the dark purple is C'Thun, down to the color of the eye, and the green reminds me of Yogg-Saron.
That shield is just silly. Poking out the eye shurely is painful.