Why is the "white to brown & white to blue" gradient generally considered a shiny metal?
What is the reasoning/theory behind this? Why those colours? (If someone says chrome, you might first think of shiny silver & gray — not brown & blue!)
Where was it first used to depict metal?
(Bonus: could it be succesfully used without the metal/chrome association?)
Image shows how Photoshop thinks the "chrome" gradient is oriented by default.