Earlier quoted context omitted.
We did have yellow pens in Germany, but thinking back on it, the forest green of Faber-Castell [0] was the color I would associate with pencils the most. [0] https://www.faber-castell.com/products/GraphitepencilCastell...
Also blue. Staedler was blue, with a black top.
The occassional ones were red and black, I think those were more likely to be 'B' or '2B' ones, but it's been longer than I can remeber since I used such a pencil.