Murals are on buildings all over Denver, but someone put their own mark on a mural on Colfax.

And instead of calling police - as 9NEWS photojournalist Corky Scholl shows - the business, Illegal Pete's on Colfax, decided to make an offer.

"We're not necessarily looking to find these guys and have them arrested, but we just want them to know that there's true effort that's put into these things and it's a positive thing for Denver to do these great murals -- just be respectful," an Illegal Pete's employee told 9NEWS.

See what happened next in the video above.