After scouring this and several other sites I have yet to come to a conclusion on the correct colour currently in use by British afvs in Iraq.
I though i’d share my findings so far.
The current standard defines only two colours for use as temporary finishes on afvs, These are BS381:361 Light Stone and BS381:380 Camouflage Desert Sand.
See Standard here
It seems that both these colours are in use at the moment but the one used on C2s, Warriors, Bulldogs etc is Light Stone. This is a mustardy yellow colour. It has not changed however since the 1930s and is the same colour used on Shermans, Valentines etc
It is my belief that it is the use of modern dgital cameras that have led to some believeing there to be a new colour just for the recent conflicts.
The image below shows an afv being sprayed before deployment with a sherman painted in Xtracolours Light stone super-imposed over it

This is not how it looks in real life however. My dads C2 below is sprayed in light stone though it looks a different colour

Tweaking the hue on both images however show that it is the same colour


Light stone can be obtained from Model Master, Xtracolour and White Ensign.
I would be interested to here from anyone who has seen serving vehicles and can comment on
the accuarcy of my findings.
John