Are the AVEDA Salon hair dyes vegan?

I searched and searched for the answer to my question: "Are the Aveda Salon's hair dyes vegan??". I finally found someone who had something to say about it. I will link it here for future reference:
LINKAGE Written by: Annie B. Bon
She says: 
    "Salon brands of hair dye are almost all 100 percent synthetic and petroleum-based. The dyes are usually the controversial oxidative dyes. Aveda uses oxidative dyes like the rest of the industry (albeit in a small percentage), because so far there are no plant formulas that can provide consistent, long-lasting dyes. Oxidative dyes make up the 1 to 3 percent synthetic ingredients of the Aveda formulations...
    Oxidative dyes have no pre-existing colors until they are combined and joined with oxidizing ingredients. Most dyes use a synthetic to do this, but Aveda did research into essential oils and plant extracts, and have found and patented a process to oxidize the dye using green tea extract. Not only is the end process less petroleum-based, but the result is more natural looking. The common base formulas for dyes are petrochemical solvents, and in this process Aveda has substituted protective and lubricating plant oils in the formula so that it is significantly less drying to the hair than the solvents normally used."