I made a thing if y'all are interested:
(PS: may not be 100% correct, but hasn't misled me yet)
This also highlights a problem on the 25%-75% parts, cause for the same colours without Shade it now becomes 50% (50%/2=25%) & 37.5% (37.5%*2=75%) which doesn't make any sense since the colour mult should be the same regardless of Shade 🙊