Have network tests report yellow instead of red?

I must be blind, but I am unable to find a way to have a xymonnet test result go yellow instead of red.

If I have the following line in my hosts.cfg:
0.0.0.0   foo.bar.com # telnet

I'd like the telnet test to report yellow instead of red when the port test is not responding. I see I can prefix it with "?" to have it return clear instead of red, but how can I make it return yellow instead of red?

-- 
    Do things because you should, not just because you can.

John Thurston    XXX-XXX-XXXX
user-ce4d79d99bab@xymon.invalid
Enterprise Technology Services
Department of Administration
State of Alaska