Brightness Of Pattern Numbers

What is the meaning behind the varying brightness of pattern numbers in the following screenshot?

That is indeed the story. Actually it should be the more “intenser” the colour gets.
Some colours don’t get darker but intenser…

I mean the yellow pattern numbers, not the matrix segments. 0 and 1 are bright, 2 and 3 are dim, 4 and 5 are bright, 6 is dim.

It’s a setting under the [Song Settings] tab. Look for “Pattern/Seq. Highlight” - Each song can have it’s own setting.