today I had a Macallan Fine Oak 21 and a Fine Oak 25 in wooden boxes in hands.
On the labels I noticed that the 21 was marked "whisky tint 12" the 25 with "whisky tint 15".
Indeed the 25yo is darker.
I tried to find a scale somewhere - on the Macallan homepage as well - to learn more about what the tint value stands for or is supposed to tell me.
Has somebody here progressed further in this quest?