Dark Purple (#301934)

/* Background */
.element {
    background-color: #301934;
}

/* Text */
.element {
    color: #301934;
}

/* Border */
.element {
    border: 1px solid #301934;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #301934,
        #214F19
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #301934,
        #214F19
    );
}

// SCSS variable
$dark-purple: #301934;

// With RGB channels (useful for rgba() usage)
$dark-purple-r: 48;
$dark-purple-g: 25;
$dark-purple-b: 52;

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