4 Ruthenium

Re: Inspiron 7559 how to change keyboard backlight colour

With the current models (yours is a couple of cycles old) there are options for keyboard colors -- with yours, there is not.  You'd have to find out if it's possible to fit a keyboard from a newer system (and even if it is, there's no guarantee the mainboard will support the color change, since your system never shipped with that option).