The first column is a Heat Map Table does count toward the color interval calculation. But it seems the corresponding format seems to not be applied to it.
The next picture can illustrate the behavior:

In the next picture i can illustrate our workaround on this issue. We transform the first column to a string in a way that Domo doesn't use it to calculate the color intervals with a Beastmode like "CONCAT(' ',`Year`)", in this way we achieve our desired results.

What is your view on this, is this by design, is it a bug, what is it's purpose?
Thank you