I'm in the process of touch up on my Eddy Merckx. It is somewhat problematic in that it has a fade dark teal to white paint job. I'm using Testors paint and I think you might have luck with yours using that as your colors look pretty straightforward. I bought a bunch of different colors and use a pipette to mix in small drops of tint, in the case of my bike, mixes of Testors teal, white and green. Do the work under natural light. I just did my first round under a harsh incandescent, thought I got a good match, but the darker colors were too dark when I brought it out in the light.

Another pointer I saw in another thread: White paint is often too white for vintage bikes and mixing in a tiny bit of yellow will antique it up a bit.