Jahura sees red for Tora? I am pretty sure I established purple as her main aura color, somewhere, with her astral voice being different than the aura. During the Faerie adventure, whatever it was called, Tora made her way through the Underworld. It turned her astral voice purple, until she went back through the Underworld to get home. And when she had that major split in the beginning, Tora Plum (the rogue astral) was purple. There's a good chance here that there are more than one wavelength within Tora's energy/aura, maybe physical/spiritual or conscious/subconscious as red/purple. Maybe the incident with Tora Scarlet and Tora Plum split created this?
Purple is also the color Tora chose for the "tattoos" which helped her focus her psi abilities (they have since washed off, being makeup). Dorian's tattoos are blue/teal (and actual tattoos, though some were erased and others changed by the faerie magic). I think I wrote it this way as an indication of spiritual/psychic energy, and deliberatly differing from astral voice color.
And since we have so many people using blue, if Dorian needs a color voice he will likely not be blue.