Im allergic to PPD, wat colours can i die my hair? please helpp !!?

-im really badly allergic to hair dye, even if i die someone elses hair i come up in a really ba rash but i remember dyeing my sisters hair purple and i didnt come up in a rash? can someone help i wanna go dark or red or purple??there is a range of natural dyes out there in the henna range,its not only red.lagoona is good