I liked that livery as well. It was made on the corporative, classic colors of the Telefónica company. A while later, they basically reversed the colors and came up with what they use now:
The car would have probably looked better on a blue livery with lime letters, instead of the other way round.
In fact, all what they needed to do was having the whole car painted like the rear wing.
BTW, aerodinamically-wise that was one of the best cars of the season. Seriously. For some reason, they couldn't generate enough grip over a single lap in qualifying and were confined to the final row, but on race day they were less than two seconds off the pace. With a proper engine, and not a former Stewart engine from the 1998 season (which wasn't very good even in 1998), that car would have scored lots of points.