// DEFAULT OPTIONS

// Prefix for Hover class names
$nameSpace: 'hvr';

// Durations
$fastDuration: .1s;
$mediumDuration: .3s;
$slowDuration: .5s;

// Colors
$primaryColor: #e1e1e1;
$secondaryColor: #666;
$highlightColor: #ccc;
$activeColor: #2098D1;
$shadowColor: rgba(0, 0, 0, .6);

// Speech bubbles options
$tipWidth: 10px;  //the width of the speech bubble tip
$tipHeight: 10px; //the height of the speech bubble tip
$tipColor: $primaryColor;

// Arrows options
$spaceBetweenTextAndArrows: 2.2em;

// Curl dimensions
$curlWidth: 25px;
$curlHeight: 25px;

// Curl colors
$revealAreaColor: white;    // reveal area behind the curl
$curlLineColor: #aaa;       // crease line
$curlTransitionColor: #ccc;	// color transitioning from crease line to final color
$curlLastColor: white;		// final color of the back of the curl

// Browser Prefixes - Which CSS prefixes should be used?
$webkit: true;
$moz: false;
$ms: false;
$o: false;

// Compile with or without classes
$include-classes: true !default;

// DEFAULT OPTIONS

// Prefix for Hover class names
$nameSpace: 'hvr' !default;

// Durations
$fastDuration: .1s !default;
$mediumDuration: .3s !default;
$slowDuration: .5s !default;

// Colors
$primaryColor: #e1e1e1 !default;
$secondaryColor: #666 !default;
$highlightColor: #ccc !default;
$activeColor: #2098D1 !default;
$shadowColor: rgba(0, 0, 0, .6) !default;

// Speech bubbles options
$tipWidth: 10px !default;  //the width of the speech bubble tip
$tipHeight: 10px !default; //the height of the speech bubble tip
$tipColor: $primaryColor !default;

// Arrows options
$spaceBetweenTextAndArrows: 2.2em !default;

// Curl dimensions
$curlWidth: 25px !default;
$curlHeight: 25px !default;

// Curl colors
$revealAreaColor: white !default;    // reveal area behind the curl
$curlLineColor: #aaa !default;       // crease line
$curlTransitionColor: #ccc !default;	// color transitioning from crease line to final color
$curlLastColor: white !default;		// final color of the back of the curl

// Browser Prefixes - Which CSS prefixes should be used?
$webkit: true !default;
$moz: false !default;
$ms: false !default;
$o: false !default;

// Compile with or without classes
$include-classes: true !default;

Make sass-variables overwritable, added !default
Make sass-variables overwritable, added !default

See
http://sass-lang.com/documentation/file.SASS_REFERENCE.html#variable_def
aults_
