Theming android app "automatically"?

So I am working on a Ionic3 app and in my variables.sccc I have set my colors like this:

$colors: (
  primary:    #488aff,
  secondary:  #32db64,
  danger:     #f53d3d,
  light:      #f4f4f4,
  dark:       #222
);

In IOS it looks like this:

myToolbarIOS
Where my icons are colored based on my primary color in my variables.scss

In Android it looks like this:
myToolbarAndroid
Here the icons are all grey and “ugly”. How can I make it so that in the Android app everything is themed the same as in the IOS app?