here's 15% on my old black 135i and 20% on my E92. interior on the 135i was black and on the e92 is Cream Beige which is even lighter than regular beige. I thought I wanted 20% as the 15% was too dark with the black interior but when I got the 20% on the beige I think now it's a tad to light sometimes. 35% will for sure be much lighter than 20%.
987.2 Cayman, Aqua Blue on Black