I am also not colorblind myself, but I also have had difficulties parsing together visual information due to visual clutter, such as bright lights, too similar color palettes (Pandemonium 3, anyone?) and just a lot of things going on at the same time.
Recollection especially was difficult to parse visually, for example to the middle bleed puddle blending in with the rest of the arena's flooring and the flashy petal effects distracting me from the mechanics going on.

Please address this issue by giving players more comprehensive colorblind options and by designing/redesigning fights with clearer visual language in mind.