After consulting the colour charts (http://www.ipmsstockholm.org/colorcharts/stuff_eng_colorcharts_uk.htm) I bought XF-61 for my dark green and XF-52 for the brown. when I airbrushed the green on it looked far to dark. Almost a Luftwaffe green.
The closets I came to seeing such a dark green was on this Spitfire
The green on this build seems more realistic http://www.britmodeller.com/forums/index.php?showtopic=52316
Which matches
I know screen resolutions and camera settings make a difference but if anyone has got some Tamiya XF-61 around I would be interested if they did a test. My disaster with plasti-kote mean I have had to stip my Spit down so before I respray I would be interested in hearing from others out there. I know colour has been a long raging topic and as many will point out weathering, paint pigment etc played a lot to do with the difereent shades of green. I think the Green was darker post 1941 when the Gray-Green scheme was introduced.
This is given as the supposed proper colour? http://www.colorserver.net/showcolor.asp?fs=34079