Actually, Luke's snowspeeder had gray stripes while Wedge's had red. Regardless, these are converted airspeeders used for planetary patrols and such. It's why they had to work hard to get them adapted to the cold of Hoth. In the EU, these airspeeders were used elsewhere. I had started building the old AMT/MPC Snowspeeder kit 15 years ago and my intention was to make it a non-Hoth one with unique blue and orange colors. The nice benefit of SF modeling is that we needn't be limited to what is actual.