Colors used for future reference:
(Part): (Base) > (Highlight) > (Shade) > (Extreme Highlight)
Light brown Bark: Rakarth Flesh > Ushabti Bone > Seraphim Sepia or Agrax Earthshade > Ushabti Bone
White Bark: Ushabti Bone > White Scar > Seraphim Sepia > White Scar
Green leaves, hair and 'muscle': Caliban Green > Kabalite Green > Biel-Tan Green > Elysian Green
Green vines, hair and branch tops: Loren Forest > (no Highlight) or Elysian Green > (no Shade) or Athonian Camoshade > Elysian Green
Brown leaves*, hair and 'turkey tail'**: Gorthor Brown or Skrag Brown > Skrag Brown or Squig Orange > (no Shade) > (no Extreme Highlight)
Bark humps: Loren Green > Elysian Green > Athonian Camoshade > (no Extreme Highlight)
Stone: Eshin Grey > Mechanicus Standard Grey > (no Shade) > Celestra Grey (Drybrush)
Symbols, eyes and mouths: Sybarite Green > (no Highlight) or White Scar > (no Shade) > (no Extreme Highlight)
Green-ish 'forest life' top/shell: Kabalite Green > (no Highlight) > (no Shade) > Sybarite Green
Green-ish 'forest life' wings: Sybarite Green > (no Highlight) > (no Shade) > White Scar
'Forest life' body: Abaddon Black > (no Highlight) > (no Shade) > Mechanicus Standard Grey
Red 'forest life' top/shell: Memphiston Red > (no Highlight) > (no Shade) > Evil Sunz Red
Red 'forest life' body: Jokaro Orange > (no Highlight) > (no Shade) or Carroburg Crimson > Troll Slayer Orange
Eyes of 'forest life': Yriel Yellow > (no Highlight) > (no Shade) > (no Extreem Highlight)
Teeth of 'forest life': Celestra Grey > (no Highlight) > (no Shade) > White Scar
Blue creatures: Lothern Blue > Temple Guard Blue > Drakenhof Nightshade > Baharroth Blue
Staff's bark: Dryad Bark > Gorthor Brown > (no Shade) > (no Extreem Highlight)
Staff's end(Fungi?) and cracks in the bark: Averland Sunset > Yriel Yellow > Casandora Yellow > Yriel Yellow
* looking back in this thread I just realized I used different colors for the Brown leaves on the Treelord base than on the Branchwych

I will need to check this when I am home from work.
** Something new I learned today, in Dutch this is called an 'elfenbankje' which literally translate into 'fairy bench'
I think that was it
Grrr, Imrahil