Deze informatie is afkomstig van de volgende site: http://www.atthefront.com/us/uniforms/whatiskhaki.html

Het is enkel door mij in het Nederlands vertaald

Het is GEEN khaki.

Summary: If you don't have time to read this primer about the colors of WWII US uniforms and gear, here's the gist:

WWII U.S. militaire uniformen en uitrusting waren GEEN khaki. 
Er was slechts ëën uniform dat in de tweede wereldoorlog gebruikt werd dat khaki was- het zomer service uniform(the summer service uniform). 

Geen ander uniform of uitrustingsstukr, nniet de M41 field jackets,(veld jacks) tanker jackets (tank jacks), cartridge belts (munitie riemen), haversacks (haverzakken), wool shirts (wollen shirts) of trousers (broeken), musette bags- zelfs niet de machtige M1942 paratrooper jump uniforms waren khaki.Geen enkele. Ze waren "od", wat staat voor "olive drab". Dit is ontegenzeggelijk een historisch feit, gedocumenteerd en makkelijk te bewijzen. The quartermaster corps, the War Department, the Army, the Air Corps, en zelfs the soliders refer this stuff as "od" in official correspondence, supply catalogs, manufacturing specifications as well as first person accounts of the War. 

All of our products are historically correct WWII colors. We go to great lengths to obtain and copy authentic and original WWII samples in new or unused condition. Besides the fact that the sheer volume of items made during the War resulted in numerous variations in shade, please keep in mind that field use results in discoloration due to fading and soiling. Well-worn authentic examples are often lighter in color due to these factors. 

Many customers want to compare our colors to those used in movies- that will not work. Besides the uniforms used in the movies being dirty and artificially aged, the film itself has had enormous amounts of editing done to suit the desires of the directors- Therefore, the saturation and colors you see on screen are not entirely accurate. Lastly, the settings on your computer monitor and our own editing software make it difficult for the photos on the website to match the actual items perfectly. Regardless, we guarantee that our products are absolutely, positively, the historically accurate and correct colors. You may think we are wrong, but you are mistaken. Government documents shown further down the page will end the discussion.

Waarom noemt iedereen het "khaki"?

Simplicity. Although there are numerous official shades of "od" (the government numbered them 1 thru at least 33), this covers every item made for the military from socks to tents to aircraft. Most items we deal with, uniforms or field gear, were od no. 3 or od no. 7. ("no"= number). The wool service uniform was od no. 33 but that rarely comes up. 
I surmise that the term "khaki" came into use sometime after the introduction of od no. 7. This shade is a distinctly dark green, where as od no. 3 is a light olive shade, sometimes approaching a golden brown. Side by side, calling one "green" and one "khaki" makes sense. Most collectors simply refer to od no.3 as "khaki" and od no. 7 as "od". This is fine when dealing with original gear and guys who have some clue as to what they are talking about. Enter the general public, who have little knowledge or experience with original militaria, add "Saving Private Ryan" and that little mini-series about how the 506th won the War we have trouble. To them, "khaki" = "Banana Republic" and the shit hits the fan.

Met andere woorden "khaki" moet niet letterlijk genomen worden.

Welke kleur is de "juiste"kleur? Er zijn er zoveel...
Despite rigid government specifications, "od" or "khaki" is not one single consistent color. All WWII uniforms and equipment exhibit a wide range of color and shade variations. When millions of items are produced, perfectly matching shades, even of the same color, are rare. With regard to od 3, originals range from olive, to pea green, mustard-brown to olive brown. There is no single correct shade. However, the later, a light olive-brown, is generally regarded as the most desirable. That's the shade that we go to great lengths to duplicate.
Further complicating matters are the peculiarities of light effects- in fluorescent or indoor light, even the happiest of khakis often appears more clearly olive. The same item in sunlight will usually appear much more tan or brown.

Het nummer 1 argument: 
Het materiaal dat ik zag in Saving Private Ryan en Band of Brothers was khaki! Jullie zijn allemaal gek! 
Nee, je bent eenvoudig het slachtoffer van de Zionist conspiracy dat Hollywood controleert.. De kleuren die je in de films ziet, op je tv T or this very monitor liegen tegen je. Films are edited- same way as they edit out the zits on Playboy Bunnies' bums. 
We are here to help cure your ignorance...
To end this one, check out this comparison. The jacket on the left is THE very jacket worn by "Reiben" in SPR. On the right, is one of our reproductions. Looked "khakier" in the movie? You've been hoodwinked. Once again, our stuff is correct, even for the movies.

You're not very nice...
Oh, it's about to get worse. Nice doesn't cut it. We learned some years ago that terse and crude hammers the point in and quells dissent far better than "how can we better serve you sir?" My goal is to create realistic reproductions that are as painfully close to the "real" thing as possible, and I'm not inclined to change my ways. Originals are olive drab, NOT KHAKI. If originals were matching beige, then we would do it. But they aren't and we won't so quit asking. We make the best stuff out there and that's that.

The proof. Government Documentation.

1. "Khaki" is not khaki . It is olive drab no. 3. The catalog from the US Army Quartermaster, Armed Service Forces Catalog QM 3-1, 1943, refers to items in this color as being simply "od". Later products that were the darker "od green" (in collector jargon) are referred to as "od no7". This is FACT. Not fantasy or conjecture. Unbelievers, note the documentation below:

Original US Army  Quartermaster Catalog from 1943	Note that painful  little term- "od".  Not khaki.	Only one uniform is  khaki-  the cotton summer service dress.

2. OD3 is indeed a green. Let me repeat that. OD3 is a shade of green. Not tan. It's brown + green = olive drab. Go buy some water based paints and play around. You'll see quickly.

M42 Jump Jackets? Damn those look olive...	M42 Jump Pants? Nope. More green crap.	M41 Field jackets? This can't be right. Where's the khaki?
The shirt label. Just in case you think I'm making this up...	Official specifications  for the Jump Uniform	The mighty M42 Jump Uniform was...od!  Go ahead, use my gun...
This is truly tragic. The greatest generation apparently fought the entire War without realizing that their uniforms were the wrong color. It seems we weren't the only ones who sent green uniforms to our "customers".  How can we make this right?  Let's sue the War Department, Sigmund Eisner Co., Goodall Mfg., and King Kard Overall Co.!

3. What about "khaki"? There a couple of "khaki" items in the QM catalog. They are the khaki cotton shirt, cotton trousers and cotton service coat, worn as a summer dress uniform. This uniform is truly khaki. That's it. 
The table below shows the most popular items in their correct color, just for clarification.

Actual, unworn, unfaded, original WWII uniforms in the respective colors. Note that when compared to "real khaki" one can easily see that OD No. 3 is indeed greenish.
Khaki	Olive Drab no. 3	Olive Drab no. 7
Cotton Shirt Cotton Trouser Summer Service Coat	M41 Field Jacket Tanker Jacket M1942 Jump Uniform *Field gear (Until '43)	HBT Uniforms M1943 Field Uniform *Field gear ('43-45)
*US fieldgear was gradually changed from OD3 to OD 7 starting in late '42 or early '43. The colors were used concurrently and sometimes components of both colors were used on one item. Gear made using mixed colors is called "transitional" by collectors.

3. Why does everyone call it "khaki" then? Used and faded OD no3 gear and uniforms often appear beige. The keyword is used. That's where the fantasy/ stupidity gets started. When new, they range from grass-stain green, to light brown, to gold, khaki-gray, to a brownish beige. To fuss about our products (or anyone else's) they must be compared to new condition (unissued) original samples. Not Grandpa's M41 that he wore at Kasserine Pass. 
In practice, dying wasn't (and isn't) a perfect science. WWII uniforms and gear come in countless shades of OD no3. This was not due to some elfin impulse to torment collectors in the future, but rather as a result of dozens of different fabric mills finishing millions of yards of fabric in a hurry. Anyone who tells you that all US uniforms are the exact same color is a blithering idiot. Or colorblind. More likely the former.