Medium Slate Blue (#7B68EE)

/* Background */
.element {
    background-color: #7B68EE;
}

/* Text */
.element {
    color: #7B68EE;
}

/* Border */
.element {
    border: 1px solid #7B68EE;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #7B68EE,
        #F5F8E4
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #7B68EE,
        #F5F8E4
    );
}

// SCSS variable
$medium-slate-blue: #7B68EE;

// With RGB channels (useful for rgba() usage)
$medium-slate-blue-r: 123;
$medium-slate-blue-g: 104;
$medium-slate-blue-b: 238;

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