It is a bold move especially with such a low gorge. I think if you wanted to go full 1970s East German resistance philosopher, creased slacks in a gently faded colour - perhaps somewhere between grey, beige and your jumper - would take you there. The jeans are a bit too modern!
Jens Reich in 1990
That was a proper laugh out loud. It's a mood board I want to see more of for sure.