Lynn Varley debuted on Batman Annual # 8 (1982) written by Mike W. Barr and penciled by her then partner Trevor Von Eeden.
Varley provided the coloring for Miller's Ronin (1984), an experimental six-issue series from DC Comics that proved that comics in unusual formats could be commercially successful, and The Dark Knight Returns (1986), a four issue mini-series that went on to become a commercial and critical success. In a special edition, Miller notes that Varley was also the one who helped create the futuristic slang that Carrie Kelly and other characters use.
Subsequently, Varley colored other Miller books, including The Dark Knight Strikes Again, 300, Elektra Lives Again, Big Guy and Rusty the Boy Robot (with Geoff Darrow), as well as a number of covers for the Lone Wolf and Cub series. She also colored the backgrounds for the 300 movie (2007), produced by Miller.