Rosso Corsa (#D40000)

/* Background */
.element {
    background-color: #D40000;
}

/* Text */
.element {
    color: #D40000;
}

/* Border */
.element {
    border: 1px solid #D40000;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #D40000,
        #00D4D4
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #D40000,
        #00D4D4
    );
}

// SCSS variable
$rosso-corsa: #D40000;

// With RGB channels (useful for rgba() usage)
$rosso-corsa-r: 212;
$rosso-corsa-g: 0;
$rosso-corsa-b: 0;

// Usage
.element {
    background-color: $rosso-corsa;
    color: rgba($rosso-corsa-r, $rosso-corsa-g, $rosso-corsa-b, 0.8);
}