The way this works nowadays is that applications are expected to provide a symbolic version of their app icon, preferably as .symbolic.png. The HighContrast theme picks these up automatically.

Maybe if we are lucky, Jakub has some cycles to create a symbolic variant?

Created attachment 301242 [details] [review]
icon: provide a symbolic variant of the app icon

Since 3.16 the high contrast accessible theme is
covered by the recolorable symbolic variant of the app icon.

The symbolic size has been introduced to hicolor to cope with
the nominal size of 16x16 rather than the backward compatible
128x128.

Some of the publically installed icons actually belong to the local
resource too.

Pushed to master.

I had to remove the "icon-name" specified in the various Windows for the symbolic icon to show up. I guess it doesn't automatically take the variant if specified.

That means that icons look wrong unless you've installed it to --prefix=/usr or are running a jhbuild shell.

There is probably something that can be done about it, but I'm not up to date.

(In reply to Christian Hergert from comment #4)
> That means that icons look wrong unless you've installed it to --prefix=/usr
> or are running a jhbuild shell.
> 
> There is probably something that can be done about it, but I'm not up to
> date.

Good enough for now. If that really needs to be solved, a new report can be opened about it.