The colours listed sound right. The darker colour could be RLM 71 green, as the European camouflage was, at first, just over-painted - it would depend on the period, although I believe a colour darker than RLM 79 Sandgelb was used later. The white band s the theatre marking for the MTO, and the yellow cowlings and rudders are tactical/ID markings, first used in the BoB.
Note that the lower section of the antenna mast is not yellow, ut plain, varnished wood.
The MTO is not a particularly strong point of mine, so perhaps another member can provide more info.
The area of the wing you mention as the outer two thirds, is the HP leading edge slat, which deployed at low speeds and certain AoA, and what you are seeing is just the same demarcation line between upper and lower colours.