Minecraft wiki entry for Leaves, associated text: In the inventory, oak, jungle, acacia, dark oak, and mangrove leaves are colored
 #48B518.
Spruce leaves are colored
 #619961, and are not affected by biome or inventory color.[1]
Birch leaves are colored
 #80a755, and are not affected by biome or inventory color.[1]
Azalea leaves are not colored.