Mikado Yellow (#FFC40C)

/* Background */
.element {
    background-color: #FFC40C;
}

/* Text */
.element {
    color: #FFC40C;
}

/* Border */
.element {
    border: 1px solid #FFC40C;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #FFC40C,
        #0C47FF
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #FFC40C,
        #0C47FF
    );
}

// SCSS variable
$mikado-yellow: #FFC40C;

// With RGB channels (useful for rgba() usage)
$mikado-yellow-r: 255;
$mikado-yellow-g: 196;
$mikado-yellow-b: 12;

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