I should point out, though, that even Visual Studio does not show syntax highlighting in high contrast mode.  It's not an excuse, but, rather, another data point concerning how hard it is to override the defaults.

The black-on-black settings appears to be an issue with some WinJS styling.  We're looking into it.

Thank you, I appreciate it muchly.

Simply Text 3.2.8.0; Lumia 950XL, Windows 10.0.14965.1001

• With High Contrast Black, all document text is white on black

• With High Contrast Light, all document text is black on white

• With High Contrast OFF, document syntax style colors work

The High Contrast theme is, as I understand it, meant to improve readability by removing 'decorative' colors. Syntax colors are 'functional' though, and I think there is a way to declare styles as 'important', 'required' or similar, to make them work with High Contrast themes.

Useful?

-ms-high-contrast media feature
hxxps://msdn.microsoft.com/en-us/library/windows/apps/hh465764.aspx

-ms-high-contrast-adjust property

hxxps://msdn.microsoft.com/en-us/library/windows/apps/hh441137.aspx

High contrast themes

hxxps://msdn.microsoft.com/windows/uwp/accessibility/high-contrast-themes

Are you saying that the syntax styling also doesn't work in High Contrast Black, or are you saying it isn't working at all on your system regardless of theme?

• Some settings are invisible; text is black on black, see screenshot here (Ellipsis➡Settings➡Editor...): https://mobile.twitter.com/W10101010101 … 2604602368

• Also, the syntax highlighting feature doesn't work (all document text is white on black)

Update: Both the above bugs were fixed in Simply Text 3.2.9.0