[gtksourceview] Adwaita.xml: tweak styling for XML

[Christian Hergert <chergert src gnome org>]

commit dafd6c4a71e167f9572cfc077fa7cdd4afff3e81
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jan 24 13:14:48 2022 -0800

    Adwaita.xml: tweak styling for XML

 data/styles/Adwaita-dark.xml | 9 +++++----
 data/styles/Adwaita.xml      | 3 ++-
 2 files changed, 7 insertions(+), 5 deletions(-)
---
diff --git a/data/styles/Adwaita-dark.xml b/data/styles/Adwaita-dark.xml
index 97a93942..9e39069d 100644
--- a/data/styles/Adwaita-dark.xml
+++ b/data/styles/Adwaita-dark.xml
@@ -174,9 +174,10 @@
   <style name="vala:attributes"            foreground="light_5" bold="false"/>
 
   <!-- XML -->
-  <style name="xml:attribute-name"         foreground="orange_5"/>
-  <style name="xml:attribute-value"        foreground="violet_4"/>
-  <style name="xml:element-name"           foreground="teal_5"/>
-  <style name="xml:processing-instruction" foreground="teal_5" bold="true"/>
+  <style name="xml:attribute-name"         foreground="orange_3"/>
+  <style name="xml:attribute-value"        foreground="violet_2"/>
+  <style name="xml:element-name"           foreground="teal_3"/>
+  <style name="xml:namespace"              foreground="yellow_4"/>
+  <style name="xml:processing-instruction" foreground="yellow_4" bold="true"/>
 
 </style-scheme>
\ No newline at end of file
diff --git a/data/styles/Adwaita.xml b/data/styles/Adwaita.xml
index 5509a642..77e09801 100644
--- a/data/styles/Adwaita.xml
+++ b/data/styles/Adwaita.xml
@@ -174,6 +174,7 @@
   <style name="xml:attribute-name"         foreground="orange_5"/>
   <style name="xml:attribute-value"        foreground="violet_4"/>
   <style name="xml:element-name"           foreground="teal_5"/>
-  <style name="xml:processing-instruction" foreground="teal_5" bold="true"/>
+  <style name="xml:namespace"              foreground="yellow_6"/>
+  <style name="xml:processing-instruction" foreground="yellow_6" bold="true"/>
 
 </style-scheme>
\ No newline at end of file