Opener wire colours

I have a small problem. I’m not good with colours and am confused about the opener wires.

My opener looks like this. I can’t definitely say which one is purple and which one is blue.

In this picture that I found here in the forum. It looks to me like the two colours are reversed.

Then when looking in the nuki spare parts shop I see this, which looks to me like my cable.

Can someone please tell me which is which?

In all pictures the outer cable is purple.

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