The lighting varies on these , but they are a Olive Green color, they came from the US Navy

The Bullard C30 Classic Series 6-Point Ratchet Suspension Hard Hat is a cap style hard hat with a 6 point suspension featuring a replaceable cotton brow pad. The suspension system has six points of attachment with six separate keys for a secure fit and 1" wide crown straps for extra comfort. The ratchet suspensions can be adjusted between hat sizes 6 1/2" - 8" with vertical adjustment capabilities (two in front, two on side, three in rear) for a secure fit to different head sizes. Features accessory slots for attaching a variety of accessories such as earmuffs and face protection, including those of other manufacturers. Distinctive Three-Rib trademark. Made in the USA. ANSI/ISEA Classification: Z89.1-2014, Type I, Class E and G. CSA Classification: Z94.1-2015, Type I, Class E and G.