Five...

Colour co-ordination

It is not about the colour, but the naming of it.
We stand around gesticulating with arms spread wide

for brights, our posture closed in for cosy reds.
One girl stands looking up with one arm out and one by her side

and we all take this to be blue. But our room is only blue and green
by circumstance of naming: it is not about the colour

until we read out the shades we find: Pepper Grass,
Green Trance, Treasure Isle, Cozumel.