Light Yellow (#FFFFED)

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

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

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

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

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

// SCSS variable
$light-yellow: #FFFFED;

// With RGB channels (useful for rgba() usage)
$light-yellow-r: 255;
$light-yellow-g: 255;
$light-yellow-b: 237;

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