The colour of the 54th session of the CSW is Opaque:
1.not transparent or translucent; impenetrable to light; not allowing light to pass through.
2.not transmitting radiation, sound, heat, etc.
3.not shining or bright; dark; dull.
4.hard to understand; not clear or lucid; obscure: The problem remains opaque despite explanations.
5.dull, stupid, or unintelligent. (www.dictionary.com)
Opaque is not a color.