change color of Aqua Mail symbol (icon) on homescreen from blue to red

[logic]

I remember when I set up the account, there was a choice of colors for the Aqua Mail symbol/icon at bottom of home screen but I can't figure out how to now change it...any help?

[Kostya Vasilyev]

Was not for the home screen -- for notifications.

And yes, Android 5 and newer forces notification icons to pure white. There is a longer explanation in the FAQ.