To use colours in the jippii room you need to use the euro symbol. (€)
This needs to be followed by one of the colour codes listed below, followed by your message.

Red = r
Blue = b
Green = g
Magenta(purple) = m
Yellow = y
Cyan = c
White = 0
Black = 1
Grey = 2
Light Grey = 3
Lighest Gray = 4

So for example to send a red message saying hello you would type this '€rHello'.
Job done :)

Cluber