Question: which trees are used to make colours?
Answer: Catechu or Cutch tree (brown)
Gamboge tree resin (dark mustard yellow)
Chestnut hulls (peach to brown)
Himalayan rhubarb root (bronze, yellow)
Indigofera leaves (blue)
Kamala seed pods (yellow)
Madder root (red, pink, orange)
Mangosteen peel (green, brown, dark brown, purple, crimson)