castaway's list is no substitute for a specification of ANSI escapes, and her resulting regex suffers from the same problem as yours, although they break on opposite cases: neither takes into account that you can put any number of colours (including just one) in the same escape sequence by separating them with a semicolon. Yours will also match more than just escape sequences. Use 
s/\e\[\d+(?>(;\d+)*)m//g;

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Makeshifts last the longest.

In reply to Re: Removing ANSI Color Codes by Aristotle
in thread Removing ANSI Color Codes by narse

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