Cyan Husk

Cyan Beetles only appear in the frozen part of the caverns, and they do not hand the husk over every time, so it trickles in rather than arriving in useful amounts. Dyeing a full armor set plus accessories takes far more than a casual trip through the snow will give you.

If you actually want the color, treat it as a deliberate trip. Light a long flat tunnel through the underground snow, run it a few times, then take everything through a Dye Vat in one go. Otherwise keep whatever falls out and put the color on a single accessory where one bottle is enough.