Minor display issue, colour in top and bottom

[syntaxerror]

There is a minor display issue, regarding colour in bottom and top, compared with all other apps on my phone (Honor 7).

It hasn't physical buttons in bottom, they are displayed onscreen, normally on a black background. In this app though, they hardly display as it's white on light grey. Also top field normally have black background, but in this app it's blue:

How it should look, to match other apps: