Wow, I have very sensitive fingers
I was going to say that it must be close to the white Progressive (judging by my "two finger test") but they are 29 mm long and that's too long for the front shocks.
Considering that I already tried Pinks, I got a set of Yellow Linear from HPI (302g) and the results were the same as the Orange Yok. The added benefit is that they are longer than the Yok spring not needing huge spacer clips.
The result is the same in terms of handling (that's what I felt).
I was looking at a few setups from RC Lab UK and I can see that a lot of drivers are using the Yellow HPI springs but with the lighter oil (???) . I found the rebound to be unacceptable and that's why I went to a heavier oil.
I guess I will stick with the Yellow (#6850) 70 wt oil combination.