OT photography question.

I am asking this here because I know some of you are very knowledgeable
on the subject. I want to take digital photos of black and white
drawings with red and green pencil markups. The reds and greens are
not bright.
So far I can get the resolution I need but the reds and greens don't
show up so great. I think the problem is in the spectrum of the light
i am using. I have tried the flash on the camera, fluorescent
lighting, and sunlight.
I am going to build a stand to position the camera over the drawing (or
part of it). I will add lighting fixtures to the stand to get the
quantity of light but the quality of the light. I can get what ever
will work (metal halide, Ott lights, quartz etc.)
If you can suggest a better group I'll take it there, I found about 900
hundred photography groups.
Any way this has noting to do with who Cheny shot or Lie, Spin and
Deny.