Red-purple (#E40078)

/* Background */
.element {
    background-color: #E40078;
}

/* Text */
.element {
    color: #E40078;
}

/* Border */
.element {
    border: 1px solid #E40078;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #E40078,
        #C9FFE3
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #E40078,
        #C9FFE3
    );
}

// SCSS variable
$red-purple: #E40078;

// With RGB channels (useful for rgba() usage)
$red-purple-r: 228;
$red-purple-g: 0;
$red-purple-b: 120;

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