Photoshop :: Printing Yellow On Brown Kraft Paper?

Here's the skinny..... I obviously have chosen to have photoshop control the color management. The closest I have come is to use the printing profile: Japan Color 2002 Newspaper without black point compensation (I think I used Relative Compensation). The only way I can get the yellow to show on the brown is to actually PRINT a brown paper background ON TOP of the brown colored paper.

Obviously, this is causing the brown paper to look quite dark. The yellow is perfect and I've now lost every other color (Navy & 3 shades of Gray). They're all dull against the multi-layered brown. I have tried manipulating the yellow to be more green or more orange and sure enough, they turn out looking green or orange. Should I switch to CMYK instead of RGB? If orange is a variation of brown, why does orange show up on brown so much easier than yellow?
 
Is there a way to manipulate the newspaper profiles to adjust for browner paper rather than grayer paper?