fix(theme): update default theme

Author: kara

src/components/button/_button-theme.scss

@@ -1,6 +1,6 @@
 
 // Applies specified coloring to three supported palettes
-@mixin md-button-theme ($property, $color:500, $opacity: 1) {
+@mixin md-button-theme ($property, $color: 'default', $opacity: 1) {
   &.md-primary {
     #{$property}: md-color($md-primary, $color, $opacity);
   }

src/components/checkbox/checkbox.scss

@@ -13,7 +13,7 @@ $md-checkbox-border-color: if($md-is-dark-theme, rgba(white, 0.7), rgba(black, 0
 /** The color of the checkbox's checkmark / mixedmark. */
 $md-checkbox-mark-color: md-color($md-background, background);
 /** The color that is used as the checkbox background when it is checked. */
-$md-checkbox-background-color: md-color($md-primary, 500);
+$md-checkbox-background-color: md-color($md-accent, 500);
 /** The base duration used for the majority of transitions for the checkbox. */
 $md-checkbox-transition-duration: 90ms;
 /** The amount of spacing between the checkbox and its label. */

src/core/style/_default-theme.scss

@@ -6,8 +6,8 @@
 $md-is-dark-theme: false;
 
 
-$md-primary: md-palette($md-blue, 500, 100, 700, $md-contrast-palettes);
-$md-accent: md-palette($md-red, A200, A100, A400, $md-contrast-palettes);
-$md-warn: md-palette($md-orange, 500, 300, 800, $md-contrast-palettes);
+$md-primary: md-palette($md-teal, 500, 100, 700, $md-contrast-palettes);
+$md-accent: md-palette($md-purple, 500, 300,800, $md-contrast-palettes);
+$md-warn: md-palette($md-red, 500, 300, 900, $md-contrast-palettes);
 $md-foreground: if($md-is-dark-theme, $md-dark-theme-foreground, $md-light-theme-foreground);
 $md-background: if($md-is-dark-theme, $md-dark-theme-background, $md-light-theme-background);