Rubine Red (#D10056)

/* Background */
.element {
    background-color: #D10056;
}

/* Text */
.element {
    color: #D10056;
}

/* Border */
.element {
    border: 1px solid #D10056;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #D10056,
        #A3FFD9
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #D10056,
        #A3FFD9
    );
}

// SCSS variable
$rubine-red: #D10056;

// With RGB channels (useful for rgba() usage)
$rubine-red-r: 209;
$rubine-red-g: 0;
$rubine-red-b: 86;

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