Nick, thank you for answer!
Actually I'm building FineMolds' 109K kit as this "Red 7" so I'm interesting in selecting right colors for it. Mr. Kiyokazu Isomi built his 109K according latest JaPo Bf.109K book and here you can see his finished model:
http://www.hsgalleries.com/gallery04/bf109k4ki_1.htm
As you can see his choice was RLM 75/83/76 scheme:
At HyperScale discussion forum there were words what it was actually "Blue 7" but some one who own JaPo vol.2 wrote what according this book now it's "Red 7". Also local modeler who also own JaPo vol.2 wrote the same info later. But as for now I can't contact him so I'm trying to find owner of vol.2 again
I think what 2 other modelers couldn't be wrong and you can find info about this plane in your copy
Thank you very much in advance!