[gnome-boxes/overwrite-gnome-software-key-colors] appdata: Use purple color as key-color for GNOME Software

[Felipe Borges <felipeborges src gnome org>]

commit f3bea3e31152489125395ca7ca59db57c8f85ef5
Author: Felipe Borges <felipeborges gnome org>
Date:   Tue Dec 21 21:03:16 2021 +0100

    appdata: Use purple color as key-color for GNOME Software
    
    Our logo is very light and usually a grey background is getting
    picked. So let's use #8F7CD1 because it seems to contrast fine
    with Adwaita's #2e3436 and #eeeeec.
    
    This also gets picked up in apps.gnome.org
    
    See also 
https://gitlab.gnome.org/GNOME/gnome-software/-/wikis/Software-metadata#how-to-set-the-carousel-tile-background-colour

 data/org.gnome.Boxes.appdata.xml.in | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/data/org.gnome.Boxes.appdata.xml.in b/data/org.gnome.Boxes.appdata.xml.in
index 267707ae..7c64b7f4 100644
--- a/data/org.gnome.Boxes.appdata.xml.in
+++ b/data/org.gnome.Boxes.appdata.xml.in
@@ -64,4 +64,8 @@
   <url type="translate">https://wiki.gnome.org/TranslationProject</url>
   <translation type="gettext">gnome-boxes</translation>
   <content_rating type="oars-1.1" />
+  <custom>
+    <value key="GnomeSoftware::key-colors">[(143, 124, 209)]</value>
+  </custom>
+
 </component>