Change the color of the tooltip icon

On my form at https://straatrommelmarkten.nl/straatrommelmarkt-aanmelden I use tooltips. At this moment the icon for the tooltips is blue (standard), but I want to have it black and maybe a little bit bigger.
How can I change the color of that icon (at the right of the label and asterisk) ?

Hi Remko74,

Please see this FAQ

Bob

Hi Bob,

That FAQ is only about the asterisk and the "tooltip" in case some required information is missing. That is not what I mean.
What I mean is the color of the blue circle with exclamation mark in it, next to the asterisk.

Remko

Hi Remko74,

The same method will work with the tooltip. For example:

.gbs3 .input-tooltip {
  color: red !important;
  font-size: 48px !important;
}

Bob

Yes! That is what I was looking for. I couldn't find which class I had to use. But now I know.

Thanks and have a nice day!

Remko

...Is it also possible to change the exclamation mark into a question mark or other symbols?

Remko

Hi Remko,

Yes, this seems to work OK

.gbs3 .input-tooltip:before {
  content: "\f06b";
}

Bob

Hi Bob,

Thank for your help and inspiration for new possibilities. I used "\f05a" for the info icon. It looks Great!

Remko