Tweak default dark theme colors (#4074)

app/src/main/res/values/colors.xml

@@ -5,8 +5,8 @@
     <color name="colorPrimaryDark">#435E7E</color>
 
     <!-- Dark Application Colors -->
-    <color name="colorDarkPrimary">#212121</color>
-    <color name="colorDarkPrimaryDark">#1C1C1D</color>
+    <color name="colorDarkPrimary">#242529</color>
+    <color name="colorDarkPrimaryDark">#202125</color>
     <color name="colorAmoledPrimary">@color/md_black_1000</color>
 
     <color name="splashBackgroundColor">@color/colorPrimary</color>