Tooth of Ymir ‘Mechs and vehicles use appropriate camouflage, but the head and shoulders or turrets are painted to give a frosted appearance.
Per FM: Merc (revised), page 104.
Other references:
Grasshopper, CM: Mercenaries (p 111)
The Tooth’s insignia is a single canine tooth carved from ice. Per FM:Mercenaries Revised, page 104.
