Blue Green (#0D98BA)

/* Background */
.element {
    background-color: #0D98BA;
}

/* Text */
.element {
    color: #0D98BA;
}

/* Border */
.element {
    border: 1px solid #0D98BA;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #0D98BA,
        #BA2F0D
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #0D98BA,
        #BA2F0D
    );
}

// SCSS variable
$blue-green: #0D98BA;

// With RGB channels (useful for rgba() usage)
$blue-green-r: 13;
$blue-green-g: 152;
$blue-green-b: 186;

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