I'm getting the same results in Latest Chrome and using MB Columns.
My color picker intensity bar drops down. the fix is giving the colorpicker holder a min-with:255px;
Adding/replacing this in your color.css file within the main metabox plugin folder:
.rwmb-color-wrapper .wp-picker-holder {
position: absolute;
z-index: 9;
min-width:255px;
}