[gtk/wip/jimmac/HC-focus] HC: more contrasty focus rings

[Jakub Steiner <jimmac src gnome org>]

commit edc57e42820a161f83d3e8982bd71197f11ce54b
Author: Jakub Steiner <jimmac gmail com>
Date:   Wed May 6 19:28:05 2020 +0200

    HC: more contrasty focus rings

 gtk/theme/HighContrast/_colors-hc.scss | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/gtk/theme/HighContrast/_colors-hc.scss b/gtk/theme/HighContrast/_colors-hc.scss
index f9c038bbe7..d9dfc278cd 100644
--- a/gtk/theme/HighContrast/_colors-hc.scss
+++ b/gtk/theme/HighContrast/_colors-hc.scss
@@ -14,3 +14,7 @@ $alt_borders_color: if($variant == 'light', darken($alt_borders_color, 33%), lig
 $insensitive_fg_color: mix($fg_color, $bg_color, 50%);
 $insensitive_bg_color: mix($bg_color, $base_color, 60%);
 $insensitive_borders_color: mix($borders_color, $bg_color, 80%);
+
+//focus rings
+$focus_border_color: if($variant == 'light', transparentize($selected_bg_color, 0.2), transparentize(white, 
0.4));
+$alt_focus_border_color: if($variant == 'light', white, transparentize(white,0.4));