@Miriamm
They remind me of World War 1 dazzle camouflage (https://en.m.wikipedia.org/wiki/Dazzle_camouflage)

It's not just that they are all the same colours, but they've also managed to disrupt the perception of the shapes

Even worse, they've put the icons on my phone in circles so nobody else's app has a distinctive shape either, and there are plans to 'theme' them to the same colour

It's hard to make a unified set of icons while keeping them distinctive and meaningful, Google's camo paint makes it harder