[gtksourceview] style: tweak adwaita style

[Christian Hergert <chergert src gnome org>]

commit af601ad773dceaec7820ed3aed30ccc265f652ad
Author: Christian Hergert <chergert redhat com>
Date:   Sat Jan 16 23:57:48 2021 -0800

    style: tweak adwaita style

 data/styles/Adwaita.style-scheme.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/styles/Adwaita.style-scheme.xml b/data/styles/Adwaita.style-scheme.xml
index bcadb89f..81fdb078 100644
--- a/data/styles/Adwaita.style-scheme.xml
+++ b/data/styles/Adwaita.style-scheme.xml
@@ -70,7 +70,7 @@
   <!-- Global Settings -->
   <style name="text"                        foreground="dark2" background="light1"/>
   <style name="selection"                   background="selection_bg"/>
-  <style name="map-overlay"                 background="blue1"/>
+  <style name="map-overlay"                 background="#rgba(46,52,54,.3)"/>
   <style name="cursor"                      foreground="dark2"/>
   <style name="line-numbers"                foreground="light4" background="light1"/>
   <style name="current-line"                background="light2"/>