The colour wheel is very useful.
And the only way to get a colour you are happy with is to mix it.
Unless there is a ready made paint colour that is just right.
That looks great, well done.
It is important to get all the corrections sorted out before release or you will hear a lot of criticism from across the water.
I have done a quick test of Humbrol No2 & No3 on a coach.
It's a bit rough but from left to right
1 No2 + yellow
2 No3 Brunswick
3 No2 + No3
4 No3 + yellow
5 No2 + No3 + yellow
I want to paint 2 coaches in CIE green. So i need to know is the dark green on the Murphy Models/Bachmann correct.
Or should it be lighter like the coach in The quiet man film?
The 2 pictures are here for you to see the difference.