Colton's best year was 1994, when he was runner-up to David Grace.
Outside motorsport, Colton was an influential figure in the development of software for personal computers, particularly those made by Acorn Computers, being the author of the Acornsoft View range and View Professional for the BBC Micro while working at Protechnic in the early 1980s. View Professional was the predecessor of the PipeDream integrated suite for the Cambridge Z88 portable computer, Acorn Archimedes and IBM PC compatibles. Having founded Colton Software to market PipeDream, the company followed up with a range of applications - Wordz, Resultz and Recordz - comprising the Fireworkz suite, this being released for RISC OS and Microsoft Windows. In a tribute to Colton, Charles Moir, founder of Computer Concepts - the "chief rival" to Colton Software - called him "one of only a handful of people in this country who could and did develop decent, competitive, mainstream applications".
- "Mark Colton". Motorsport Memorial. Retrieved 18 June 2009.
- "Colton Software and Protechnic combine". Acorn User. October 1995. p. 11. Retrieved 1 July 2022.
- "Software pioneer Mark Colton is killed in motorsport tragedy". Acorn User. October 1995. p. 13. Retrieved 2 July 2021.