Klinker wanted! (Red - Reddish brown)

Then just have the manufacturer produce a special batch that is declared as "red". Does the municipality actually look at the bricks beforehand, or is it just about a label in the building application?

In fact, they were not specified at all in the building application. The municipality doesn't look at them beforehand either. But in case of doubt, when everything is finished. And if it doesn't fit THEN, it gets ugly. Haha yes, we already had that idea too... but in the end I also don't want to get into trouble. Although I really don't want a RED clinker brick, but a BROWN one. Well... Germany, right

Sorry, but what speaks against calling all brick manufacturers and explaining your problem to them?

Advantages: direct binding information, plus you find out the availability

Good luck!

We had chosen MOORBRAUN SCHWARZ PREMIUM (from Vandersanden).
Unfortunately, according to the manufacturer, it is BROWN.

Also, everything I found in pictures would clearly classify it as brown – even if sky blue was printed on the package. Are we still currently talking about this house:
? – then (at least according to the elevations) the cladding is only planned for the ground floor. That means one could adjust the plaster color of the upper floor to create a brown/white comparable contrast even with more reddish bricks.
I hope you have not only considered the appearance: with bricks, there is a variety of formats, which can align better or worse with the brick opening dimensions. Laypeople tend to imagine this a bit too simply. Your measurements are adjusted to Octameter / DIN, which means it can get tricky with Kloster or WDF bricks.