It drives me crazy that tab lines are hard to seen in some themes, I tried to fix it, but whatever variable in theme I change - it doesn't seem to affect the vertical lines.
It would be great if there was a separate key for tab lines.
I was pretty certain it used the comment color from your color scheme (.tmTheme). Did you try that?
Yep, tried that too, after googleing last night. Doesn't change anything. And yes I have restarted Sublime each time I applied.
If by "tab lines" you mean the guides, then:
(Use your own values, obviously.)
Hey, that worked, thanks!
What are activeguide and stackguide?
// Set to false to turn off the indentation guides.
// The color and width of the indent guides may be customized by editing
// the corresponding .tmTheme file, and specifying the colors "guide",
// "activeGuide" and "stackGuide"
// Controls how the indent guides are drawn, valid options are
// "draw_normal" and "draw_active". draw_active will draw the indent
// guides containing the caret in a different color.