Unlit patch inside the standard diffuse texture?

Hello. Long time listener, first time caller here. Can please somebody tell me what I am doing wrong in setting up the standard shader or, if this is not the right approach, how can I make an opaque texture with some totally “unlit” patches inside? Thank you.

The albedo color behind the patch should be completly black. In your case the pink in the albedo sums up to the emission color.