Office Green (#008000)

/* Background */
.element {
    background-color: #008000;
}

/* Text */
.element {
    color: #008000;
}

/* Border */
.element {
    border: 1px solid #008000;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #008000,
        #FF01FF
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #008000,
        #FF01FF
    );
}

// SCSS variable
$office-green: #008000;

// With RGB channels (useful for rgba() usage)
$office-green-r: 0;
$office-green-g: 128;
$office-green-b: 0;

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