[data-md-color-scheme=slate] {
    --md-default-bg-color: hsla(var(--md-hue),15%,22%,1);
}

[data-md-color-primary=black] .md-button--primary {
    background-color: hsla(202, 97%, 34%, 1);  /* This is the same as #036BA9 (the hex color of Merlin's hat logo) */
    border-color: hsla(202, 97%, 34%, 1);
}