Would Annatto mixed with oleoresin paprika cause an allergic reaction?
If you are allergic to neither Annatto nor Oleoresin Paparika(paprika extract), there is no reason you should be allergic to the mixture of the two.

This site even mentions the mixture of the two to get a reddish orange hue.


  Annatto blends with turmeric or paprika oleoresin expand the possibilities of the yellow to reddish-orange range.