something is you need:

List of colors
^0 = black
^1 = red
^2 = green
^3 = yellow
^4 = blue
^5 = aqua
^6 = pink
^7 = white
^8 = light grey
^9 = dark grey

if you nexuiz i too dark
v_hwgamma 1
v_gamma 1.5
v_brightness 0.1
v_contrast 0

special characters
http://ouns.wikispaces.com/conchars

join the game and if u wanna write something then press T then write something (u can write what u want) then press ctrl+s then the normal smilie apears like this one
if u wanna have colored smilies then just write before u press ctrl+s ^3

press T then ^3 then ctrl+s
there are more smilies with ctrl + s w u v t
and just press the other letters then other characters apear