I have a rifle with the same color natural gear done by Bell and Carlson . I discovered that I can change the overall tone of the stock by using a colored sharpie to fill in some of the areas. The sharpie is easily removed with brake clean. (CRC green can)
Currently I highlighted many of the brown lines with a black sharpie and it looks great.
I have had that dipped stock for 8 years and no solvent has attacked it. It is holding up well to the usual hunting exposures.