you need to add the && to each one, I saw that you updated this and it stays on all the time now I have fixed my copy. Here it is, Note that I modified it slightly but I do that with all the snippets no offense!!! :)

on :INPUT::{
if (%colourtxton == 1) && ($left($1,1) != /) {
say 15,0|0,15|14|15,14|1|8,1 $1- 1,14|15|14,15|0|15,0|
halt
}
elseif (%colourtxton == 2) && ($left($1,1) != /) {
say 9,0|0,9|3|9,3|10|11,10 $1- 10,3|9|3,9|0|9,0|
halt
}
elseif (%colourtxton == 3) && ($left($1,1) != /) {
say 11,0|0,11|12|11,12|2|9,2 $1- 2,12|11|12,11|0|11,0|
halt
}
elseif (%colourtxton == 4) && ($left($1,1) != /) {
say 13,0|0,13|6|13,6|5|4 $1- 5|13|6,13|0|13,0|
halt
}
elseif (%colourtxton == 5) && ($left($1,1) != /) {
say 8,0|0,8|7|8,7|4|8,4 $1- 4,7|8|7,8|0|8,0|
halt
}
elseif (%colourtxton == 6) && ($left($1,1) != /) {
say 4,0|0,4|7|4,7|8|7,8|9|8,9|11|9,11|13|11,13|6|13,6|13 $1- 13,6|6,13|11|13,11|9|11,9|8|9,8|7|8,7|4|7,4|0|4,0|
halt
}
}

menu channel,nicklist {
Text colourer
.black+grey:{
set %colourtxton 1
}
.green:{
set %colourtxton 2
}
.blue:{
set %colourtxton 3
}
.pink,purple:{
set %colourtxton 4
}
.red,orange,yellow:{
set %colourtxton 5
}
.rainbow:{
set %colourtxton 6
}
.COLOUR OFF:{
unset %colourtxton
}
}