try with different settings with paper and color.

I use LS/H Color Picker and Metallic options lowered to zero
And for paper: go FILE > NEW PAINTING > Basic Paper.

U could get different colors and look of your colors on paper by toying with this options.

Also, I have been working in ArtRage for... I think 6 months, so I always know what to change and how to use some things to get what I need in my images. Work everyday and try different things, u will get it.