Updated color values for tooltips as per 80/20 spec document, as per...

Updated color values for tooltips as per 80/20 spec document, as per http://jira.secondlife.com/browse/EXT-1126

indra/newview/skins/default/colors.xml

@@ -651,13 +651,13 @@
      reference="White_10" />
     <color
      name="ToolTipBgColor"
-     value="DkGray" />
+     value="0.937 0.89 0.655 1" />
     <color
      name="ToolTipBorderColor"
-     value="White_50" />
+     value="0.812 0.753 0.451 1" />
     <color
      name="ToolTipTextColor"
-     reference="LtGray" />
+     value="0.749 0.749 0.749 1" />
     <color
      name="UserChatColor"
      reference="LtGray" />