// ----
// Sass (v3.4.14)
// Compass (v1.0.3)
// ----

$colourList: (
    1  : (#000000, #000011), 
    2  : (#000011, #000022), 
    3  : (#000022, #000033), 
    4  : (#000033, #000044), 
    7  : (#000044, #000055), 
    8  : (#000055, #000066), 
    9  : (#000066, #000077), 
    10 : (#000077, #000088), 
);


@each $index, $keyNumber in $colourList {
    $background: nth($keyNumber, 1);
    $lowlight: nth($keyNumber, 2);
    header {
        .section_#{$index} & {
            background-color: $background;
            border-right: 2px dotted $lowlight;
        }
    }
}