Teal Blue (#367588)

/* Background */
.element {
    background-color: #367588;
}

/* Text */
.element {
    color: #367588;
}

/* Border */
.element {
    border: 1px solid #367588;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #367588,
        #D06140
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #367588,
        #D06140
    );
}

// SCSS variable
$teal-blue: #367588;

// With RGB channels (useful for rgba() usage)
$teal-blue-r: 54;
$teal-blue-g: 117;
$teal-blue-b: 136;

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