Custom background with xml

I just want to create a custom background but I'm not getting how to do that with xml not with image.

Here is the xml:

<RelativeLayout xmlns:android="http://ift.tt/nIICcg"
xmlns:tools="http://ift.tt/LrGmb4"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#0095A0"
tools:context="${relativePackage}.${activityClass}" >
</RelativeLayout>

and I want like this. Is it possible to create xml like the required image?