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I mean the blue icons with ambulance etc. I would like to change it. Where can I do it?

Thats exactly the shortcode from our first reply. You can change the value for “color” in the shortcode to a color of your choice.

I have one more question: I would like to insert social Media Buttons.
Where can I find them?

You can set up the links to your social networks in WP Admin -> Appearance -> Theme Options -> Social Media and use / show the icons with this shortcode:

[social-icons]