I want to change color of caret and make it not relative from input text, because it\'s hard to make it look good when it is.
Not the best way but it should work:
Add this to your stylesheet (CSS) after the Bootstrap include.
.btn-primary .caret, .btn-warning .caret, .btn-danger .caret, .btn-info .caret, .btn-success .caret, .btn-inverse .caret {
border-top-color: red;
-ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
filter: alpha(opacity=100);
-moz-opacity:1;
-khtml-opacity: 1;
opacity: 1;
}