Bleu De France (#318CE7)

/* Background */
.element {
    background-color: #318CE7;
}

/* Text */
.element {
    color: #318CE7;
}

/* Border */
.element {
    border: 1px solid #318CE7;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #318CE7,
        #FAE7D4
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #318CE7,
        #FAE7D4
    );
}

// SCSS variable
$bleu-de-france: #318CE7;

// With RGB channels (useful for rgba() usage)
$bleu-de-france-r: 49;
$bleu-de-france-g: 140;
$bleu-de-france-b: 231;

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