Cobra Pharaoh Keshik
Pharaoh Keshik 'Mechs' legs and lower torso are painted in several shades of purple, with bronze highlights on the legs. The upper torso and arms are painted in bronze with turqouise highlights.
Other references:
Mad Dog, FM: Warden Clans (plate 2)
The Pharaoh Keshik's insignia shows a coiled cloud cobra on a throne, flanked by two BattleMechs.
Per FM:Warden Clans, page 31