I'm not sure where the best place to post this is, so here are. I have two 1940s era Safe-T-Stak file drawers that someone painted brown with a rattle can decades ago. I'd like to try and match the paint color and repaint the parts that have been painted brown. Does anyone have any ideas on what the paint color is called and who make sit in some type of spray can?

I'm trying to match the "army green" color inside the drawers in the pics.
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Maybe a long shot, but check around for an industrial paint store that can put a computer color match device on the green you want, then go with a thinable/sprayable paint they can mix for you. It’s not metallic finish, so would be easy. Only problem would probably the amount of paint you would be required to buy, probably not less than a quart

Another possibility is checking with a military vehicle forum that may have info on touch up paint in various OD green shades.

That's a good idea. I'm also going to stop by a local surplus store and see if the have any recommendations.

Apparently the olive paint in the 40s was just a mix of black and ochre and resulted in many different in-spec shades of the final color.  So finding a source to match your shade might be difficult unless you can do some trial/error sample tests.  

Here's an article about modelers trying to find the correct shade:
https://mojobob.com/stuff/Zaloga%20-%20Olive%20Drab.pdf

Many paint stores can match a color you bring them.

Interior zinc chromate primer is another we have a hard time matching. Early paint was almost yellow. Got darker with the type of metal it was applied to.  Pilots didn’t like it because it was too bright in the cockpit so mfgrs added black paint to it.  That’s the standard interior green. Impossible to be accurate because who knows how much black was added on which day?  
Early Corsairs had a pink or salmon color primer that was used inside parts of the fuselage.

But back to OP’s question, I bet some Krylon rattle cans for camo come pretty damned close.  I have an old 1911 armorers case with original paint on it still. I should try matching it up one day to something.

Lowes has a color called "Amazon Silt" that closely matches early OD. I painted a steel pot my son had and the color looked practically identical to an unrestored helmet I had. I also used it to repaint some bayonet scabbards. Good luck.

Aerovoe no longer making OD?

Rebar Green looks close.

Maybe try Rapco Parts- known for paint for Jeeps and other military vehicles. It’s also catching on for rattle-can camouflage for rifles, since Aervoe is no longer making camouflage paint. Email or call the owner- he’s supposed to be very knowledgeable and helpful.

Sorry, these are the only links I have:
Rapco - Colors
Rapco - Order page

ETA: Rapco Parts - main page