Actually they make dye for eyebrows/eyelashes.
http://www.sallybeauty.com/Lash-Brow-Tint/SBS-700883,default,pd.html
That's the one the beauty supply I go to will sell to non-professionals.
I don't think dying them will cause problems(unless you have chemical sensitivities as a result of vitligo)... I would recommend going to a Spa tho especially if you want to dye your lashes as well.