Sky Blue (#87CEEB)

/* Background */
.element {
    background-color: #87CEEB;
}

/* Text */
.element {
    color: #87CEEB;
}

/* Border */
.element {
    border: 1px solid #87CEEB;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #87CEEB,
        #F4E7E3
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #87CEEB,
        #F4E7E3
    );
}

// SCSS variable
$sky-blue: #87CEEB;

// With RGB channels (useful for rgba() usage)
$sky-blue-r: 135;
$sky-blue-g: 206;
$sky-blue-b: 235;

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