Change the icon color.
Changing the color of the icons is allowed, the easy way to do it is:
1. Block all layers except the icon’s layer.
2. Select the icon you want or Go to Menu Select > all (Ctrl+A) for select all icons.
3. Then Go to Menu Window > Color and select your desired color.
4. Then Go to Menu Window > Swatches, and select your desired color from the pre-made color swatches.

You can use the icons whatever you want: web pages, presentations, apps and even for print jobs (Using the .AI file).