Hard to tell from the photo but is that a diamond non-skid or a flat non-skid?
If diamond non-skid I have not found a way to paint it. It can be repaired with new gelcoat and a silicone mat.
Flat non-skid can be sanded out and deck repaired. Lots of paint options from there.
Color is what I call "Faded Grady White". Closer to pure white. Take a pice of trim off or a frame around a compartment and look at original color. You will see! Nothing out of the can will match. It will have to be hand tinted.