diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index 90f4581568..cbafc39c9a 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<resources>
+<resources xmlns:tools="http://schemas.android.com/tools">
     <color name="colorPrimary">#039be5</color>
     <color name="colorPrimaryDark">#006db3</color>
     <color name="colorAccent">#ffb300</color>
@@ -23,6 +23,9 @@
     <color name="darkColorDrawerText">#fff</color>
     <color name="darkColorDrawerBackground">#222</color>
 
+    <!-- default: #323232 -->
+    <color name="design_snackbar_background_color" tools:override="true">#ff000000</color>
+
     <!-- color picker -->
     <color name="red">#F6402C</color>
     <color name="pink">#EB1460</color>