I use the Adaptive theme in Sublime Text, and I note that “dirty” tabs have a highlighted strip:
In the screenshot above, both the first tab and the second tab are dirty. The second tab is a list of tasks as rendered by the PlainTasks plugin. As you can see, the “dirty highlight” color on the tab is barely visible.
What could be causing this, and how could I adjust things to make the second tab’s highlight color brighter (so that it’s easier to see)?
The color that’s used to highlight modified tabs is based on the accent color that’s in use in the color scheme of the tab. One of the things that PlainTasks does is provide it’s own color scheme for task documents, so that’s why this is happening here.
To fix that you need to alter the color scheme that’s being used to add an accent color to it, which will change it. Since PlainTasks installs as an unpacked package, the safest way to do that would be to open the color scheme, Save-As it into your User folder and edit it there, and then modify the package preferences to use your version instead of the packed-in version.