Vivid Sky Blue (#00CCFF)

/* Background */
.element {
    background-color: #00CCFF;
}

/* Text */
.element {
    color: #00CCFF;
}

/* Border */
.element {
    border: 1px solid #00CCFF;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #00CCFF,
        #FFFFFF
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #00CCFF,
        #FFFFFF
    );
}

// SCSS variable
$vivid-sky-blue: #00CCFF;

// With RGB channels (useful for rgba() usage)
$vivid-sky-blue-r: 0;
$vivid-sky-blue-g: 204;
$vivid-sky-blue-b: 255;

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