Change Text Selection Color in Astra theme

Hello!

Could you please help me to find the css code to change the text selection color?

When I add this code on the additional CSS box, it does not work:
::-moz-selection {
????background-color: #CDE2FE;
????color: #fff;
}
::selection {
????background-color: #CDE2FE;
????color: #fff;
}

I know I can change the text selection color on Global > Colors > accent
But when I change it, it change many others texts.

I just like to change the text selection color.

Thanks