Hi,
Thanks for reaching out!
If you want to change the color globally then Go to Appearance -> Customize -> Theme Settings -> Typography / General settings. Scroll to the bottom. If you want to the someting specific to the section then move to that section and change it.
Red Law symbol is an image, you need to create new image with the color you want. You can check the icons here https://www.flaticon.com/.
Let us know if you have any other question.
Thanks