$-palettes: $o-color-palettes;
$o-color-palettes: ();
$i: 1;
@each $-palette in $-palettes {
    $-theme-palette: nth($o-theme-color-palettes, $i);
    $o-color-palettes: append($o-color-palettes, map-merge($-palette, (
        'alpha-light'     : lighten(map-get($-theme-palette, 'alpha'), 10%),
        'beta-light'      : lighten(map-get($-theme-palette, 'beta'), 10%),
        'gamma-light'     : lighten(map-get($-theme-palette, 'gamma'), 10%),
        'delta-light'     : lighten(map-get($-theme-palette, 'delta'), 10%),
        'epsilon-light'   : lighten(map-get($-theme-palette, 'epsilon'), 10%),

        'alpha-dark'      : darken(map-get($-theme-palette, 'alpha'), 10%),
        'beta-dark'       : darken(map-get($-theme-palette, 'beta'), 10%),
        'gamma-dark'      : darken(map-get($-theme-palette, 'gamma'), 10%),
        'delta-dark'      : darken(map-get($-theme-palette, 'delta'), 10%),
        'epsilon-dark'    : darken(map-get($-theme-palette, 'epsilon'), 10%),
    )));
    $i: $i + 1;
}