Viridian Green (#009698)

/* Background */
.element {
    background-color: #009698;
}

/* Text */
.element {
    color: #009698;
}

/* Border */
.element {
    border: 1px solid #009698;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #009698,
        #FF3431
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #009698,
        #FF3431
    );
}

// SCSS variable
$viridian-green: #009698;

// With RGB channels (useful for rgba() usage)
$viridian-green-r: 0;
$viridian-green-g: 150;
$viridian-green-b: 152;

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