What armor/dye is this?
That’s a mix of different sylvari cultural armors. Can’t tell you exactly which, but you can take a look at them here: http://wiki.guildwars2.com/wiki/Sylvari_cultural_armor (The “helm” is actually his face).
As for the color, i have no clue, also most colors look a bit different on sylvari plant/wood than on everything else.
[BNF] Mesmer, called GS abuser by Nubu
https://www.youtube.com/channel/UCJTjZ2yriM20o_36MZmMTuA/videos
https://www.youtube.com/channel/UCJTjZ2yriM20o_36MZmMTuA/videos
Looks like midnight yew or something like that, dull dark green. But, a lot of that is probably the silvari pattern that glows specific times in the day; my sylvari had a purple glow like that as well. It transfers to the cultural armours.