Text selection - Change color

Hi,

Is anyone know how to create this yellow color when pressing on text?

Yep. HEre is what you need to add to your custom code:

::-moz-selection { 
	color: #ffffff;
	background: #4700ff;   
}

::selection {
	color: #ffffff;
	background: #4700ff;   
}

edit: added control for both text and background