@@qiao1687 what are you talking about?... Valstrax's Head or Wingarm? Valstrax's head isn't a weak point but with the waterblight effects it become softer, that's why the damage numbers are orange, and regarding the wingarms, those are a weak point, the numbers there are always orange with or whitout waterblight. The effects ends in 0:49
Orange = crit, which he gets from applying waterblight at the start. If you are talking about the literal colour of the text in the video, then your answer is that he increased the contrast of the video to make it look more orange than the usual yellow of the game's default number colour.
