Ribbon cable is really helpful in situations where you need to make a lot of connections without a big mess of wires. Nothing makes a project look more finished than a nice clean wiring harness.
And if you like to keep going
7 = Violet
8 = Grey (used to be called Slate)
9 = White
0 - Black
There are lots of different colour schemes, One in common use is the “Belden” colour code. “Belden” being a cable manufacturer but several other companies use it also so it has almost become another “standard”. Telephone cable uses a different one again.
Cheers Bob
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