markings IV./JG 1 and pilot to identify

[TigerTimon]

Hello,

Soon I'll have these two pictures colourised by an artist:

https://nimh-beeldbank.defensie.nl/f...oorlogstijd%22

https://nimh-beeldbank.defensie.nl/f...%22Foto%27s%22

Now I have some questions about the markings of IV. Gruppe:

What colours did the tactical numbers and the 'o' marking behind the Balkenkreuz have?

Was it like this?

10. Staffel - white
11. Staffel - red
12. Staffel - yellow

About the 'devil in the clouds' or 'Teufel in den Wolken' emblem:
did the background have a yellow or a light-blue colour?

In the second picture, there is a pilot. Is someone able to identify him? If so, it would be possible to identify the Staffel.

Thank you very much!
Kind regards,
Timon Legemaat