AHello! I have to make navy colored cake pops and the last time I did this using candy color oil everyone's teeth and mouth turned blue. How can I avoid this?

I recently used the merckens dark blue for cake pops and it worked perfectly! It melted down really easily to a nice creamy consistency and I really was happy that I didn't have to add anything to it! I made a standard sized cake pop and got about 25 out of that 1lb bag

http://www.ebay.com/itm/Merckens-Melting-Chocolate-DARK-BLUE-1lb-bag-/201064949185?rd=1