Vivid Red (#F70D1A)

/* Background */
.element {
    background-color: #F70D1A;
}

/* Text */
.element {
    color: #F70D1A;
}

/* Border */
.element {
    border: 1px solid #F70D1A;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #F70D1A,
        #EFFFFE
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #F70D1A,
        #EFFFFE
    );
}

// SCSS variable
$vivid-red: #F70D1A;

// With RGB channels (useful for rgba() usage)
$vivid-red-r: 247;
$vivid-red-g: 13;
$vivid-red-b: 26;

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