testbed/Textualize__textual/docs/examples/styles/opacity.css

#zero-opacity {
    opacity: 0%;
}

#quarter-opacity {
    opacity: 25%;
}

#half-opacity {
    opacity: 50%;
}

#three-quarter-opacity {
    opacity: 75%;
}

#full-opacity {
    opacity: 100%;
}

Screen {
    background: antiquewhite;
}

Static {
    height: 1fr;
    border: outer dodgerblue;
    background: lightseagreen;
    content-align: center middle;
    text-style: bold;
}