User blog comment:Kogath/Monster Hunter: World Discussion/@comment-6050823-20180129175418/@comment-2194133-20180130002229

^I was thinking that too. At least to me it looks a bit more visually agressive with more striking colors. This Tempered Bazelgeuse gameplay makes them look darker, almost black in color:

https://youtu.be/rZwOf0GGyoI?t=654

I wonder if it's just an effect of the video, or if Tempered monsters do have slightly different visual designs.