Sea Blue (#006994)

/* Background */
.element {
    background-color: #006994;
}

/* Text */
.element {
    color: #006994;
}

/* Border */
.element {
    border: 1px solid #006994;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #006994,
        #FF6729
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #006994,
        #FF6729
    );
}

// SCSS variable
$sea-blue: #006994;

// With RGB channels (useful for rgba() usage)
$sea-blue-r: 0;
$sea-blue-g: 105;
$sea-blue-b: 148;

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