Confirmed so far:

(1) "We are introducing Premium Economy as a new travel class in 2022 - and an elevated long-haul travel experience with Finnair. We will tell more in January. Stay tuned and follow our channels for more information in January.​"
Source: https://www.finnair.com/se-en/freque...class--2452856

(2) "We are introducing Premium Economy as a new travel class in 2022 - and an elevated long-haul travel experience with Finnair. We will tell more in January. Stay tuned and follow our channels for more information in January.​"
Source: https://www.finnair.com/th-en/flight...try-to-country

(3) And their brand guide also shows that dark blue is going to be the ''brand color'' for Premium Economy
Source: https://brand.finnair.com/en/brand-basics/colours

Bonus:

(4) "Business travel may not recover to pre-pandemic levels as e.g. online meetings are popular and many companies are seeking cost savings. What kind of impact will this have on Finnair?

As we have already stated, Finnair is mainly a leisure-driven airline. Pre-pandemic, only c. 20% of our passengers were business-related and they generated c. 30% of our passenger revenue.

Even though it is likely that business travel will not recover as fast as leisure travel in the coming years, we believe that there is increasing demand for premium leisure travel. We are about to introduce our new travel class Premium Economy during 2022 to meet this demand. "
Source: https://www.finnair.com/en/bluewings...nd-q-a-2420328