Colorado Flags: redesigned as a system

UNITED COLORADO!
I've redesigned six major city flags from Colorado: Colorado Springs, Pueblo, Aurora, Fort Collins, Westminster, and Boulder.

The state and capital flags for Colorado already share many commonalities - to me, it implies a system. Can we use that system for other cities in the state?

We could use the same basic color, shape and line cues, but allow for some targeted variations to each city be unique and personable while existing in the same family, and adhering to best practice flag design (thank you, Roman Mars). =)

What do you think?