A large color photo of her "sister" 304 can be seen here, note the blue and yellow tactical numbers, which replaced the previous all-white numbers of the 3rd company, which were determined to be too bright, (Tigers in Combat, vol II, page 7);
http://www.tiif.de/thread.php?threadid=35&sid=90ed9ea23749e87e9c41179a8e84d866
Although most of the photos I see of 311 appear to have white numbers, it must have been repainted with blue/yellow ones too, as the Dragon kit 6700 has the blue decals. Haven't found a clear photo yet.
Other photos of 311 can be found near the bottom of the page. I have better copies of some of these if you want them.