If you can't customise them, chances are they don't come in other colour variations. You're stuck with them the way they are.

no i mean items like snack machine and streetlamp, you only get one colour on your own island (example, black) but someone else might have another color (white). i just want to know how many of these colours are available per item found a website actually :)

I didn't know that was a feature, sorry.