i think it is some sort of tricolor.... the tips violet color with a green/purple base prior to getting new bulbs, since it has turned blue and the picture actually does the color no justice as far as how blue it is. here is a pic from a long time ago...
jay those brains are dying .. you see them splitting into two eyes? that means you needa chop them up and give them to me and ill see if i can get them back to good health!!