The default clear setting on the iPhone was pretty stupid. It made my icons monochrome. I have GMail, Apple Mail, and Proton Mail installed on my phone, all of which use an envelope as their logo. Previously this had never confused me because they're different colors, and I have one of those new-fangled "Color Screens" on my iPhone that the kids use.

Then they made all the icons a weird hipster monochrome thing, and I kept opening the wrong mail client by accident, because I couldn't quickly differentiate the three different envelops.

I don't know who the hell told the Apple designers that people don't like having color in their icons, but I think that person might need a reality check.