I think technically it's named after the flower, which is named after the guy. Worth noting also that the flower was only discovered and named after him after

I think technically it's named after the flower, which is named after the guy. Worth noting also that the flower was only discovered and named after him after Leonhart Fuchs had already been dead for 130 years; the color was apparently only named another 160 years after that when someone invented a dye, decided it was the color of fuchsia flowers, and called it fuchsine. And then France won the Battle of Magenta and they renamed the commercial dye made from it 'magenta' in its honor, making TWO surprisingly recent invented color names for the price of one.