Zinnwaldite Brown (#2C1608)

/* Background */
.element {
    background-color: #2C1608;
}

/* Text */
.element {
    color: #2C1608;
}

/* Border */
.element {
    border: 1px solid #2C1608;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #2C1608,
        #083450
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #2C1608,
        #083450
    );
}

// SCSS variable
$zinnwaldite-brown: #2C1608;

// With RGB channels (useful for rgba() usage)
$zinnwaldite-brown-r: 44;
$zinnwaldite-brown-g: 22;
$zinnwaldite-brown-b: 8;

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