Coloured Dyes Removing: 'Shader effect'

[Gramul]

An easy way to point this out is by using the mythril cuirass (lv40 tank gear). It is incredibly shiny, but when you add dye it dulls out significantly.

Note how the undyed edges stay shiny. Also, an interesting feature about this armor is that it seems to turn more silvery in sunlight when undyed.
But anyway, like Shioban said, it's low priority but nice to have.