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              <div class="swatch"><pre>base</pre></div>

<div class="swatch darken"><pre>darken</pre></div>

<div class="swatch lighten"><pre>lighten</pre></div>

<div class="swatch saturate"><pre>saturate</pre></div>

<div class="swatch desaturate"><pre>desaturate</pre></div>

<div class="swatch adjust-hue"><pre>adjust-hue</pre></div>

<div class="swatch adjust-opacity"><pre>opacity</pre></div>

<div class="swatch adjust-tint"><pre>tint</pre></div>

<div class="swatch adjust-shade"><pre>shade</pre></div>
              @import "bourbon";

// set your primary color only, but feel free to adjust the other color percentages
$base-color:       #6699CC;

$darken-color:     darken( $base-color, 20% );
$lighten-color:    lighten( $base-color, 20% );
$saturate-color:   saturate( $base-color, 50% );
$desaturate-color: desaturate( $base-color, 20% );
$hue-color:        adjust-hue( $base-color, 50% );
$opacity-color:    rgba( $base-color, .5 );
$tint-color:       tint( $base-color, 50% );
$shade-color:      shade( $base-color, 50% );

// dynamically changes the text color based on the lightness of the primary color: http://thesassway.com/intermediate/dynamically-change-text-color-based-on-its-background-with-sass
@function set-text-color($color) {
  @if (lightness($color) >= 50) {
    @return #000000; // Lighter backgorund, return dark color
  } @else {
    @return #ffffff; // Darker background, return light color
// centers the text in the box
@mixin vertical-align {
  margin: 0;
  position: relative;
  top: 50%;
  transform: translateY(-50%);

// creates the swatch boxes
.swatch {
  background: $base-color;
  display: block;
  float: left;
  margin: 5px;
  text-align: center; 
  width: calc(100% / 3 - 10px);
  height: calc(100vh / 3 - 15px);

  pre {
    @include vertical-align;

// adjusting each box color
.darken {
  background-color: $darken-color;
  color: set-text-color($darken-color);

.lighten {
  background-color: $lighten-color;
  color: set-text-color($lighten-color);

.saturate {
  background-color: $saturate-color;
  color: set-text-color($saturate-color);

.desaturate {
  background-color: $desaturate-color;
  color: set-text-color($desaturate-color);

.adjust-hue {
  background-color: $hue-color;
  color: set-text-color($hue-color);

.adjust-opacity {
  background-color: $base-color;
  background-color: $opacity-color;
  color: set-text-color($opacity-color);

.adjust-tint {
  background-color: $tint-color;
  color: set-text-color($tint-color);

.adjust-shade {
  background-color: $shade-color;
  color: set-text-color($shade-color);
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