Ascetics FoW armor dyes unusually, so if you're getting that then you'd be best to look
here. The other types dye normally I think. So that armor may be a form of blue, or it may be something like yellow dye on Ascetics.
For your second question, if you dyed an armor blue after you dyed it red then it will be blue (or whatever colour blue dye creates). The most recent dye is always the one that applies - it overrides all other dyes used, no matter the armor type. I'm not sure how blue + red would turn out. On normal armours I'd assume some shade of purple. But for you, only the blue dye, not the red dye, would apply.
