Janthinobacterium

Janthinobacterium is a genus of Gram-negative soil bacteria. The name is from Latin janthinus, which means 'violet' or 'violet-blue'. It produces a purple-violet pigment, manifests diverse energy metabolism abilities, and tolerates cold, ultraviolet radiation, and other environmental stressors. http://genomea.asm.org/content/4/1/e01600-15