Bone Color (not Bone Groups)

I downloaded a rig from Blendswap (Sinon from Sword Art Online) and there are some bones which are tinted green while others are normal grey.
There are no Bone Groups in the rig, so I’m wondering how these green bones got customized! Can anyone please help? Please let me know if you’d like me to post the rig (not sure if I’m allowed to do that)
Thanks, in advance!

Assuming you are in pose mode, usually because there is a constraint on them. Check the Bone Constraints tab in pose mode to see if a constraint is on them.

stilltrying: Thank you! That was it. The tinted bones had a Copy Scale Constraint on them. Cheers