After a short hunt, along with Mikkoβs suggestion, take a look at the change log:
In Settings - user opened from Preferences | Settings Preferences | Settings , adds to the line
"highlight_modified_tabs": true,
This will cause the tab text to be orange if there are unsaved changes to the file.
To change the color from orange, it was necessary to continue digging and experimenting a bit, and it turned out that editing the theme was one way to change the color from orange.
Theme files can be found in the Color Scheme - Default folder , accessible from the Preferences | Browse Packages... Preferences | Browse Packages... - you will have to make these changes for each theme for which you want to change the text color for:
{ "class": "tab_control", "attributes": ["selected", "file_medium_dark"], "tint_modifier": [0, 255, 0, 40], "layer2.texture": "Theme - Default/medium_dark_selected_tab_bg.png", "layer2.opacity": 0.7 }, { "class": "tab_control", "attributes": ["dirty", "file_medium_dark"], "tint_modifier": [255, 0, 0, 40], "layer2.texture": "Theme - Default/medium_dark_selected_tab_bg.png", "layer2.opacity": 0.7 }, { "class": "tab_control", "attributes": ["selected", "dirty", "file_medium_dark"], "tint_modifier": [255, 255, 0, 40], "layer2.texture": "Theme - Default/medium_dark_selected_tab_bg.png", "layer2.opacity": 0.7 },
It would be nice to control the behavior of the "selected" and "dirty" (= changed) separately. It may be possible with layers, but I donβt understand them well enough yet.
Addenda
(1) The above applies to dark topics. For a light theme, omit "file_medium_dark" from the attributes.
(2) The same changes appear in Sublime Text 3 (~ / .config / sublime-text-3 / Packages / Default.sublime-theme).