Column-grid-background mixin for Compass. In some cases it seems more accurate than http://compass-style.org/reference/compass/layout/grid_background/#mixin-column-grid-background​​​, and the output is smaller.

_column-grid-background.mixin.scss

@mixin column-grid-background(
  $total          : null, // unused
  $column         : $grid-background-column-width,
  $gutter         : $grid-background-gutter-width,
  $offset         : $grid-background-offset,
  $column-color   : $grid-background-column-color,
  $gutter-color   : $grid-background-gutter-color
) {
  $column-stop: 100% * $column / ($column + $gutter);

  @include background-image(linear-gradient(left, $column-color, $column-color $column-stop, $gutter-color $column-stop, $gutter-color));

  background: {
    position: $offset 0;
    repeat: repeat;
    size: $column + $gutter auto;
  };
}