You can dye Korina, I did it. I used Reranch alcohol dyes, and it came out looking like "nuclear carrot." That was a bit of a bummer, but I washed it with paper towels and clean denatured alcohol and it tamed down into a nice amber color. If you are going to pigment the finish, I would get stuff that people have already used, like Reranch Fender neck amber, or talk to some one like Tonar about mixing it with the finish. Then I'd get a number of test pieces. My experience leads me to believe that 4-6 test pieces will let you know if it is do-able, and fine tune the formula. Your results may vary, I didn't have all that much experience with dyes when I started.
Patrick