1) Visual hallucination 
presence of abnormal coloration
• (n.) The state of being colored, as in the case of images formed by a lens. • (n.) An abnormal coloring of plants.
1. Abnormal pigmentation. ... Synonym: chromatic aberration. ... Origin: G. Chroma, colour ... (05 Mar 2000) ... 
(kro´mә-tiz″әm) abnormal pigment deposits.
Chro'ma·tism noun [ Greek ... a coloring.] 1. (Optics) The state of being colored, as in the case of images formed by a lens. 2. (Botany) An abnormal coloring of plants. 
Type: Term Pronunciation: krō′mă-tizm Definitions: 1. Abnormal pigmentation. Synonyms: chromatic aberration
[n] - hallucinatory perception of colored lights 2. [n] - abnormal pigmentation
noun abnormal pigmentation
the abnormal coloration of leaves or other normally green parts of a plant.