Ubuntu's DING extension adds new keyboard shortcuts for desktop icon selection, including multi-select, Ctrl+Space toggle, ...

Whatever color you choose will be applied everywhere icons appear. Here's how to tint your icons in iOS 18: Long press a space on your Home Screen. Tap Edit in the top-right corner. Tap Customize.

In order to keep only your newly-created icon, simply move the old icon to the App Library. To do so, long press on the icon, tap Remove App, then choose Remove From Home Screen.