The third-generation Mustang was produced from 1979 to 1993. Built on Ford’s ubiquitous Fox platform, it evolved through a number of sub-models, trim levels, and drivetrain combinations during its production life.
By 1990, Ford resources began to focus on the next Mustang, due to debut in 1994. There would be few changes in the model line through its retirement in 1993. Most changes would be visual. For 1990, a limited run of 4,103 emerald green exterior, and white leather interior 5.0 LX convertibles were produced for a contest held by 7-Up, but it was cancelled at the last second. Similarly, in 1992 and 1993, three special-edition 5.0 LX convertibles were released in the spring. These models sported with Vibrant Red exteriors with Oxford White leather interiors in 1992.
Source: Wikipedia, 2012