Vitiligo suggestions
+1
Camouflage products such as Dermablend can look very inconspicuous without a caking. I would look into the possibility of permanent medical tattooing. You need to do some research, however, to find a qualified professional, medical tattooing facility in your area that uses high-grade tattoo pigments. If you go this route, I would also recommend a test-spot in an inconspicuous area to ensure that you do not develop allergic reactions to the tattoo pigment.