Hintergrundfarbe keine
element {
background-color: transparent;
}
Long Finned Pilot Whale
element {
background-color: transparent;
}div {
opacity:25% ;
}/* To apply color to background you have to use 'background-color' property and value of property is color name. */
html,body {
background-color: blue;
}//javascript type css:
document.body.style.backgroundColor = "blue";
// or inline css:
<div style="background-color: blue;"></div>