In my never-ending quest to make things more legible…
I spent some time tearing apart the timeline; unfortunately, from a GUI standpoint, it shares a lot of code with a number of unrelated GUI items. Is called an "Adorned Ruler" and can be either horizontal (as the timeline) or vertical (as the Vertical Scale between the Track Info Panel and the Wavetrack); it is also used to draw the scales on the edges of graphs and meters.it has a default text font, text color, background color, selected background color, and tick color. Almost every GUI usage other than the timeline overrides these defaults to one extent or another. Here is a close-up example of its use labeling a graph:
A close inspection will reveal that the text color is now a dark blue instead of black. You can see this is used in the timeline, the vertical ruler, the labeling of the graph and also the meters in the toolbar.
Once again, I am not necessarily suggesting that the colors, fonts and sizes depicted herein are necessarily "good" or even "better than the default", they are used mainly here to make a visual distinction.