I'd say black-bordered yellow bands under the wing and red gear doors and wheels, with the paint wearing off the gear doors a bit. Also the anti-glare panel looks to have a thin yellow or red border. Something like 8Y or BY seems to written within the "5" on the vertical stab.
It's all various shades of grey to me.
Bare metal gear doors covered in dirt the higher up the door you go the less dirt there is.
If you look at the tires you can see this plane rolled trough a mud puddle. Then look at the gear door once again and you can see the mud splash on it.