It might be interesting to categorize the language according to the biological systems which produce it. The language may consist of colors and patterns, but is presumably produced by specialized chromatophores, if biological creatures originally produced it. What about 'chromalogic' as the adjective describing such a language, from the Greek words *chroma *(color) and *logos *(word)? The main disadvantage would be that English speakers would tend to use an etymologically incorrect pronunciation with that spelling. Matt G.