I'll second what Stacy said, with the emphasis on Soak Time. I have died and stabilized a good bit of Camel bone scales and that particular scale your pic is of I have achieved frequently when dying with a light brown die and a fairly short soak time. I also have achieved that look (undesired) when attempting a yellow color die and a longer soak time. If you want a deep color, I have found camel bone to take an keep a die color well with long soak times, I actually did some in a dark brown, and customers couldn't tell the difference between the dark brown camel bone and XXX Walnut I had on the same knife pattern.
Good luck!