Mo. Rev. Stat. § 252.041: Deer hunting during deer-hunting season with firearms, orange colored clothing required, violation, penalty.

Any person hunting deer during a firearms deer-hunting season shall wear a cap or hat, and a shirt, vest or coat with the outermost color of daylight fluorescent orange, blaze orange or hunter orange, which must be plainly visible from all sides while being worn. Any person violating rules and regulations adopted pursuant to this section shall be guilty of an infraction.