Radical Red (#FF355E)

/* Background */
.element {
    background-color: #FF355E;
}

/* Text */
.element {
    color: #FF355E;
}

/* Border */
.element {
    border: 1px solid #FF355E;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #FF355E,
        #35FFD6
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #FF355E,
        #35FFD6
    );
}

// SCSS variable
$radical-red: #FF355E;

// With RGB channels (useful for rgba() usage)
$radical-red-r: 255;
$radical-red-g: 53;
$radical-red-b: 94;

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