Output in two different colors

I want to have tethereal monitor eth0 in the background and output in a given color, and another copy monitor eth1 and output in another color - I can't figure out how to do this without the last color winning. How can I do it? -- (o< //\ Powered by SuSE Linux V_/_ Virusproof. Crashproof. 11:08am up 2 days, 3:48, 24 users, load average: 3.62, 3.28, 2.86 processes 162478