code:
[c=0][[/c][c=12]k[/c][c=0]][[/c][c=12]r[/c][c=0]][[/c][c=12]i[/c][c=0]][[/c][c=12]s[/c][c=0]][[/c][c=12]s[/c][c=0]][[/c][c=12]y[/c][c=0]][/c]
I think this is what you want.
EDIT: This is shorter than Zahid's because he has made 2 consecutive symbols the one colour individually and not put them both in the same tag.