You can hack it with the \m[<color>] escape in groff: \m[blue]int\m[] x Of course, you would use some kind of pre-processor to make this less of a PI

You can hack it with the \m[<color>] escape in groff: \m[blue]int\m[] x Of course, you would use some kind of pre-processor to make this less of a PITA, but it's not inconceivable.