Use CSS
to change the icon.
Download the round icons package: https://developers.google.com/classroom/assets/classroom_circle_logo.zip
Upload the icon you want somewhere online an overwrite the background-image
-rule
When using the example code I get e CSS
rule like:
.mgQYsb {
background-image: url("https://www.gstatic.com/classroom/logo_square_48.svg");
}
overwrite this rule with
.mgQYsb {
background-image: url("<your url>/<your logo>") !important;
}
And let's hope the class stays the same. Or you might find a more general rule which does not take the class into account like
div.hrIdWidgetContainer>div>div> {
background-image: url("<your url>/<your logo>") !important;
}
I tried to play around with the actual rule to see if the round logo is somewhere in the same folder on gstatic.com, but did not find anything.