pack colors, the 3.1 rule question

So apparently this is a new rule I did not know of until needing for Kingslend;

but the ratio for colors must be 3.1

is there any way to negogiate? it makes it more difficult to choose colors, and I understand some are too light, but would 2.5 be even a bit okay? a lot of the pack colors now fit that that point, or even less.

trying to get a pink color, is very unfortunate to do because how high the contrast must be as shown



i personally feel it may be a bit much and limits quite a bit.
could it even be just a bit less??