FWIW, in my setup (10th gen i5, RTX 5070 Ti in an old Define R3 case), the 12 cm Noctua G2 fans run quieter and have a much less obnoxious noise than the old P/F series, which wipe the floor with the Arctic fan I bought for a computer that lives in the basement and sounds like it's about to take off.
They do have the most insane pricing. I could see myself buying some in the 15€ range but not 35€.
This is an enthusiast product, as evidenced by the premise that you care about color-coordinating the inside of your computer.