Color blindness, the inability to discriminate certain colors visually, is common in male humans where it prevents the discrimination between reds, yellows, and greens. Other forms of color blindness in humans are far less common.
Until recently, we could only post Tesla's estimated range rating of 265 miles for the 85-kWh version of the Model S, but now there's been some real-world testing, conducted by Motor Trend, which proves that Tesla wasn't off the mark by much.
The Tesla Roadster can go a lot faster than previous electric cars, but perhaps more importantly, it can go a lot farther. The Roadster's estimated range is 250 miles on a single charge, at least 100 miles more than General Motors' EV1, which could go almost 150 miles under optimal conditions. Most of the hype surrounding the Roadster is about its status as an electric vehicle.