http://www.sencha.com/blog/getting-sassy-with-css

android.scss

// Let's start with the basics
$base-color: #333;
$active-color: #ff8100;
$base-gradient: 'flat';

// Buttons
$button-gradient: 'bevel';

// Lists
$list-bg-color: #eee;
$list-color: #333;
$list-pressed-color: #ddd;
$list-active-gradient: 'recessed';
$list-header-bg-color: #999;
$list-header-gradient: 'bevel';

// Tabs
$tabs_dark_color: #000;

@import 'sencha-touch/default/all';

@include sencha-panel;
@include sencha-buttons;
@include sencha-sheet;
@include sencha-picker;
@include sencha-tabs;
@include sencha-toolbar;
@include sencha-toolbar-forms;
@include sencha-carousel;
@include sencha-indexbar;
@include sencha-list;
@include sencha-list-paging;
@include sencha-list-pullrefresh;
@include sencha-layout;
@include sencha-form;
@include sencha-msgbox;
@include sencha-loading-spinner;