It’s nova launcher, paid, but worth it. Also has the nice side effect that when you move to a different phone tour UI remains the same

Gorillaz:

Nibbles:

Word rescue:

Look it doesn’t look as good as your UI, but it’s as close as I could get to the monochrome look that I wanted, The widgets still have full colour:

You can do the same monochromatic thing with nova launcher and whicons

Unfortunately “life” doesn’t mean “untill death” in SA