It's either very effective camo or the way my monitor's set up but I can hardly make out anything in your shots, especially the last one. Did you take them at night?

The camo used on the Spitfire & other RAF fighters depended on the period they were in service & the theatre they were operated in. Early Spitfires up to & includng the BoB were in the dark green & brown markings but in 1941 the brown was changed to grey. I really can't tell from your shots but the Mk IX used in Europe would almost certainly have been the later grey & green. I'm sure there were official names for these colours but I've never seen the green referred to as Forest green.
http://freespace.virgin.net/john.dell/spitmark.htmThe name of the company is Vickers Supermarine.