While the black accents may look better in the Sun, a little lighter contrast helps you see better at night and in the dark (or working on it in a garage with dim lights.) With all black, your details are going to disappear in the dark, and you'll have to carry a Maglite (security flashlight) in your front pants pocket like me: but I'm always prepared :-)
On my gold and black bike (and some silver like yours,) I'm adding red accents in AL and reflective contrasts to be better seen by cars. With all black, you will be invisible in the shadows. Just remember, Johnny Cash is dead, RIP.