You can not change the icon color in the Outlook app but you can add a pinch of color to the program. For this, you can go to Outlook > Settings > General > Appearance, then change the Modern ...

There are also several color themes ... size of your on-screen icons. You can alter the density on your smartphone too, but it’s in a different tab. If you use Outlook on your desktop device ...

I hope these steps help you. This post will help you if the Dark Mode is not working in the new Outlook app. How do I change the background color in Outlook Windows 11? To change the background ...