Desert paint color

[Mike Starmer]

I have read this thread with increasing concern. Having actually seen and matched these colours and own some originals this is the gen.
Light Stone 61; Nearest is FS 20260. FS33448 is the 1948 and current colour which is close to BS 361 Light Stone.
Portland Stone 64; FS 33564 towards 33685. FS 33722 is a little too pale and FS 30277 is closest to Light Mud for Italy 1943.
Desert Pink ZI is a new colour introduced in October 1942. I would be most interested to know where you learned that it is a mixture of Light Stone and Red Oxide?
The colour card reproduced here is unreliable to say the least both in colour and use advice.