[gnome-builder] rg: add graph styling for builder dark theme

[Christian Hergert <chergert src gnome org>]

commit c0730a7691892f186b950870d9c1d315d80226cd
Author: Christian Hergert <christian hergert me>
Date:   Mon Jun 1 22:45:32 2015 -0700

    rg: add graph styling for builder dark theme

 data/theme/Adwaita-dark.css |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/data/theme/Adwaita-dark.css b/data/theme/Adwaita-dark.css
index 6d3859e..768ddd9 100644
--- a/data/theme/Adwaita-dark.css
+++ b/data/theme/Adwaita-dark.css
@@ -16,3 +16,9 @@ GbProjectTree.view.cell:selected {
   background-color: #215d9c;
 }
 
+RgGraph {
+  background-color: #2e3436;
+  background-size: 8px 8px;
+  background-image: repeating-linear-gradient(0deg, #32383a, #32383a 1px, transparent 1px, transparent 8px),
+                    repeating-linear-gradient(-90deg, #32383a, #32383a 1px, transparent 1px, transparent 
8px);
+}