Hotel Tango, I remember surfing their website last week when looking for a return trip to Koeln (up against EZY who won out!) and there was a quote on the website saying something like "we don't want to paint our aircraft in brash primary colours - thats just not us" or something along those lines.
The duo brand was trying to be a smart, full-service & executive type airline - although sadly like Air1 & Legend Airlines before them, this type of operation on its own doesnt win out!