What is the colour code for the colour grey used on MacBooks

Depends on the color scheme you are using. There is probably a fairly good match with one of the Pantone color numbers, but you would need to make a visual comparison against the standard color patches to find the exact match. There are other schemes like the European RAL which is often used for paint color specifications. You could also try to match as a process print color using CMYK designations, or a screen color using RGB. However you match it there is no guarantee it will be a perfect match in all lighting conditions.

I dunno - Space Grey. If you go to the apple store, and look up Macs then go to notebooks /macbooks or macbook pro it will tell you somewhere what colours it’s available in which would tell you the color of the MacBook casing. There is no colour code afaik, just a name / description.. i suppose if you could find someone and were willing to pay them enough, they could change the colour of your MacBook/MacBook Pro or the older/ newer Mac Pro’s ( tower model... but thats just speculation, i have no idea who would do it, how you’d find ‘em, what colours they might offer or how long it might take/ how much it might cost...

john b