What material are Benchmade's thumb studs made of? How do they color them like on the bugout?

[BloodyDonnie]

Benchmade customer service said all the screws are Stainless steel, but if the thumb studs are stainless as well, how did they get such vibrant and shiny colors on them for some of their models?

Same with the pivot collar for the Benchmade custom Crooked River, what material are they? If not titanium then what method does Benchmade use to color them?

 

[cali]

Bugout thumbstuds are made of aluminium alloy and anodized, but it is an exception, usually thumbstuds are made of stainless steel, natural colour or blued in some way.