Color Outside The Lines Meaning

(intransitive) To behave in creative or unconventional ways, to break the rules.

Example: Used other than as an idiom: see color,‎ outside,‎ lines.
‎2009, James L. Nolan Jr, Legal Accents, Legal Borrowing: The International Problem-Solving Court Movement:
  As one American problem-solving court judge put it: “We are the judges who get to color outside the lines.”
‎2007, Bret Anthony Johnston, Corpus Christi: Stories:
  It comes from the fact that skaters are more likely, as you say, to color outside the lines, and that inclination frightens and confuses most people and institutions.
‎2008, Matthew Paul Turner, Churched: One Kid's Journey Toward God Despite a Holy Mess:
  For most of my life, I've watched my mother resist the urge to color outside the lines. Not because she didn't want to do it, but because some part of her wasn't free enough.