Dark Tan (#918151)

/* Background */
.element {
    background-color: #918151;
}

/* Text */
.element {
    color: #918151;
}

/* Border */
.element {
    border: 1px solid #918151;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #918151,
        #6079C2
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #918151,
        #6079C2
    );
}

// SCSS variable
$dark-tan: #918151;

// With RGB channels (useful for rgba() usage)
$dark-tan-r: 145;
$dark-tan-g: 129;
$dark-tan-b: 81;

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