.gritter-item,
.gritter-bottom,
.gritter-top {
    background-color: transparent;
}

.gritter-item-wrapper.gritter-info {
    background-color: rgba(0, 0, 128, 0.7);
}

.gritter-item-wrapper.gritter-error {
    background-color: rgba(200, 0, 0, 0.7);
}

.gritter-item-wrapper.gritter-success {
    background-color: rgba(0, 128, 0, 0.7);
}

.gritter-item-wrapper.gritter-process {
    background-color: rgba(128, 128, 0, 0.7);
}