From 2speccers2tools wiki

In a completely different direction to the hybrid Poopycells, this offshoot of the versatile Asshole cell has settled comfortably into the niche of waterborne algae. Forgoing the earthy brown pigments of its ancestry, it has adopted a “brilliant” blue photosynthetic pigment; well, “vibrant” in the sense that it still retains some brown pigments. This gives the plucky little Nomlight a distinct coloration reminiscent of a urinal cake.