    $progress-bar-base-color: $base-color !default;

    $progress-height: 20px !default;

    //borders
    $progress-border-color: adjust-color($progress-bar-base-color, $hue: 0deg, $saturation: -3.08%, $lightness: -23.725%) !default;
    $progress-border-width: 1px !default;
    $progress-border-radius: 0 !default;

    //backgrounds
    $progress-background-color: adjust-color($progress-bar-base-color, $hue: 0deg, $saturation: -11.37%, $lightness: 7.451%) !default;

    //bar
    $progress-bar-background-color: adjust-color($progress-bar-base-color, $hue: 0deg, $saturation: 8.187%, $lightness: -17.647%) !default;

    //text
    $progress-text-color-front: #fff !default;
    $progress-text-color-back: adjust-color($progress-bar-base-color, $hue: 0deg, $saturation: -10.895%, $lightness: -43.725%) !default;
    $progress-text-text-align: center !default;
    $progress-text-font-size: ceil($font-size * .9) !default;
    $progress-text-font-weight: bold !default;