Light Brown (#B5651D)

/* Background */
.element {
    background-color: #B5651D;
}

/* Text */
.element {
    color: #B5651D;
}

/* Border */
.element {
    border: 1px solid #B5651D;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #B5651D,
        #1D6DB5
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #B5651D,
        #1D6DB5
    );
}

// SCSS variable
$light-brown: #B5651D;

// With RGB channels (useful for rgba() usage)
$light-brown-r: 181;
$light-brown-g: 101;
$light-brown-b: 29;

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