Rifle Green (#444C38)

/* Background */
.element {
    background-color: #444C38;
}

/* Text */
.element {
    color: #444C38;
}

/* Border */
.element {
    border: 1px solid #444C38;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #444C38,
        #483860
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #444C38,
        #483860
    );
}

// SCSS variable
$rifle-green: #444C38;

// With RGB channels (useful for rgba() usage)
$rifle-green-r: 68;
$rifle-green-g: 76;
$rifle-green-b: 56;

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