How to change splash background color for mobile android

I set up my launch portrait
And when game started i see black border on my mobile on top and bottom on launch screen
How to change it to other color
i find splashscreen_p.xml in Intermediate\Android\arm64\gradle\app\src\main\res\drawable\splashscreen_p.xml
but when i changed it, nothing to do

Can someone help me

Hi, Its not working because you need to change this value in
C:\Program Files\Epic Games\UE_4.25\Engine\Build\Android\Java\res\drawable\splashscreen_p.xml

android:color/white // put your color here.

android:scaleType=“fitXY” // fit splash image to screen width and height.