$btn-white: #fff;
$btn-gray: #bbb;
$btn-light-gray: #e5e5e5;

$btn-primary: #38f;
$btn-primary-hover: #59f;
$btn-primary-active: #27f;

$btn-danger: #f44;
$btn-danger-hover: #f66;
$btn-danger-active: #e33;

$btn-success: #4b0;
$btn-success-hover: #6c2;
$btn-success-active: #0a0;