added generated file header, fixed contrast functions

Gruntfile.js

@@ -95,7 +95,15 @@ module.exports = function (grunt) {
               pattern: /.generic-variations\(unquote\(("([^"]+)?")\), (\$[\s\S]+?(?!\r|\n)), {$\n[\s\S]+}\);$\n/mg,
               replacement: '@include alert-variations(unquote($1), $3);\n',
               order: 250 // very broad search, do this last
-            }
+            },
+
+            // auto generated notice
+            { // Multi-line replacement - https://regex101.com/r/aR2kT5/1
+              pattern: /([\s\S]+)/mg,
+              replacement: '\/\/ This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. \n\n$1',
+              order: 1000 // very broad search, do this last
+            },
+
           ]
         }
       }

sass/_alerts.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .alert {
     border: 0px;
     border-radius: 0;

sass/_buttons.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 @mixin btn-shadow(){
   @include shadow-z-1();
   transition: box-shadow 0.28s cubic-bezier(0.4, 0, 0.2, 1);

sass/_cards.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .card {
 
     /***** Make height equal to width (http://stackoverflow.com/a/6615994) ****/

sass/_checkboxes.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .form-horizontal .checkbox {
   padding-top: 20px;
 }

sass/_colors.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 /*
 
 To get this list of colors inject jQuery at http://www.google.com/design/spec/style/color.html#color-color-palette

sass/_dialogs.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 //
 // Modals
 // Material Design element Dialogs

sass/_dividers.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 hr {
   &.on-dark {
     color: lighten($black, 10%);

sass/_icons-material-design.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 @font-face {
     font-family: 'Material-Design-Icons';
     src:url('#{$material-font-path}/Material-Design-Icons.eot?3ocs8m');

sass/_icons.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .mdi, icon {
     @include variations(unquote(""), color, $lightbg-text);
     line-height: inherit;

sass/_inputs.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 fieldset[disabled] .form-control, .form-control {
   &, &:focus, &.focus {
     padding: 0;

sass/_labels.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .label {
     border-radius: 1px;
     @include variations(unquote(""), background-color, $grey);

sass/_lists.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .list-group {
   border-radius: 0;
   .list-group-item {

sass/_mixins-shared.scss

@@ -1,5 +1,34 @@
 // This file is NOT automatically converted and must be manually merged
 
+// contrast-color and brightness borrowed from compass
+// Copyright (c) 2009-2014 Christopher M. Eppstein
+// Complies with license: https://github.com/Compass/compass/blob/stable/LICENSE.markdown
+@function contrast-color($color, $dark: $contrasted-dark-default, $light: $contrasted-light-default, $threshold: null) {
+  @if $threshold {
+    // Deprecated in Compass 0.13
+    @warn "The $threshold argment to contrast-color is no longer needed and will be removed in the next release.";
+  }
+  @if $color == null {
+    @return null;
+  }
+  @else {
+    $color-brightness: brightness($color);
+    $dark-text-brightness: brightness($dark);
+    $light-text-brightness: brightness($light);
+    @return if(abs($color-brightness - $light-text-brightness) > abs($color-brightness - $dark-text-brightness), $light, $dark);
+  }
+}
+
+@function brightness($color) {
+  @if type-of($color) == color {
+    @return (red($color) * 0.299 + green($color) * 0.587 + blue($color) * 0.114) / 255 * 100%;
+  }
+  @else {
+    @return unquote("brightness(#{$color})");
+  }
+}
+
+
 // variations(unquote(""), background-color, #FFF);
 @mixin variations($extra, $material-param-1, $default) {
   @include generic-variations($extra, $default, "variations-content", $material-param-1);
@@ -41,11 +70,9 @@
   //@debug "#{inspect($args)}";
   $material-color: map-get($args, material-color);
   $material-param-1: map-get($args, material-param-1);
-  $contrast-factor: map-get($args, contrast-factor);
+  background-color: contrast-color($material-color,
-  background-color: contrast($material-color,
           darken($material-color, $material-param-1),
-          lighten($material-color, $material-param-1),
+          lighten($material-color, $material-param-1));
-          $contrast-factor);
 }
 
 @mixin bg-color-variations($extra, $default, $material-param-1) {
@@ -168,14 +195,12 @@
 
 @mixin generic-variations($extra, $default, $mixin-name, $material-param-1) {
 
-  $contrast-factor: 40%;
   //setup map to pass parameters (instead of the incredibly long-error-prone list for each and every @include)
   $args: (
           extra: $extra,
           default: $default,
           mixin-name: $mixin-name,
-          material-param-1: $material-param-1,
+          material-param-1: $material-param-1
-          contrast-factor: $contrast-factor,
   );
 
   // bootstrap styles
@@ -212,7 +237,7 @@
             material-color-name: "inverse",
             material-color-full-name: "inverse",
             material-color: $inverse,
-            material-text-color: contrast($inverse, $lightbg-text, $darkbg-text, $contrast-factor)
+            material-text-color: contrast-color($inverse, $lightbg-text, $darkbg-text)
     ));
     @include call-variations-content-mixin($args-inverse);
   }
@@ -270,7 +295,7 @@
   $material-color-number: map-get($args, material-color-number);
   $material-color-full-name: "#{$material-color-name}#{$material-color-number}";
   $material-color: map-get($args, material-color); // $material-color-full-name;
-  $material-text-color: contrast($material-color, $lightbg-text, $darkbg-text, map-get($args, contrast-factor));
+  $material-text-color: contrast-color($material-color, $lightbg-text, $darkbg-text);
 
   &-material-#{$material-color-name}#{unquote($material-color-number)}#{map-get($args, extra)} {
     $args-color: map-merge($args, (

sass/_navbar.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .navbar {
   background-color: $primary;
   border: $zero;

sass/_panels.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .panel {
   border-radius: 2px;
   border: 0;

sass/_plugin-dropdownjs.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .dropdownjs:after {
     right: 5px;
     top: 3px;

sass/_plugin-nouislider.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .noUi-target,
 .noUi-target * {
     -webkit-touch-callout: none;

sass/_plugin-selectize.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 // Support for Selectize plugin
 // http://brianreavis.github.io/selectize.js/
 

sass/_plugin-snackbarjs.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 // Support for SnackbarJS plugin
 // https://github.com/FezVrasta/snackbarjs
 

sass/_popups.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .popover, .tooltip-inner {
   color: $popover-color;
   line-height: 1em;

sass/_progress.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .progress {
     height: 4px;
     border-radius: 0;

sass/_radios.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .form-horizontal .radio {
   margin-bottom: 10px;
 }

sass/_shadows.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 @mixin shadow-z-1 {
   box-shadow:
     0 1px 6px 0 rgba(0, 0, 0, 0.12),

sass/_tabs.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .nav-tabs {
     background: $primary;
     > li {

sass/_togglebutton.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .togglebutton {
   vertical-align: middle;
   &, label, input, .toggle {

sass/_variables.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 // Material Global vars
 $zero: 0 !default;
 

sass/_welljumbo.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 body, .container, .container-fluid {
 
   .well.well-sm {

sass/material-fullpalette.scss

@@ -1,2 +1,4 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 @import 'material';
 @import '_mixins-fullpalette';

sass/material.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 @import '_colors';
 @import '_variables';
 @import '_mixins';

sass/ripples.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 .withripple {
     position: relative;
 }

sass/roboto.scss

@@ -1,3 +1,5 @@
+// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten. 
+
 @import '_variables';
 @import '_colors';