Falu Red (#801818)

/* Background */
.element {
    background-color: #801818;
}

/* Text */
.element {
    color: #801818;
}

/* Border */
.element {
    border: 1px solid #801818;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #801818,
        #19E7E7
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #801818,
        #19E7E7
    );
}

// SCSS variable
$falu-red: #801818;

// With RGB channels (useful for rgba() usage)
$falu-red-r: 128;
$falu-red-g: 24;
$falu-red-b: 24;

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