Islamic Green (#009000)

/* Background */
.element {
    background-color: #009000;
}

/* Text */
.element {
    color: #009000;
}

/* Border */
.element {
    border: 1px solid #009000;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #009000,
        #FF21FF
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #009000,
        #FF21FF
    );
}

// SCSS variable
$islamic-green: #009000;

// With RGB channels (useful for rgba() usage)
$islamic-green-r: 0;
$islamic-green-g: 144;
$islamic-green-b: 0;

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