White Computer Keyboard

Why the color of most computer’s keyboard is black/white. Not any other any reason?

VERY SIMPLE DEAR, TO EASY ACCESS ON EVERY LETTER,BECAUSE BLACK PRINTING ON WHITE KB & WHITE PRINTING ON BLACK KEY BOARD IS VERY EASY ACCESS,

HAVE YOU EVER SEEN WALL CLOCK (NOT DIGITAL) ON RAILWAY STN,CLOCK TOWER,OFFICES,HOSPITALS ETC.. THEY ALL HAVE BLACK & WHITE WALL CLOCK TO READ EASILY

How to Clean a Computer : How to Clean a Keyboard