.wp-block-separator.is-style-colorful {
    position: relative;
    width: 100% !important;
    background-color: #170d69;
    height: 4px;
    border: none;
}

.wp-block-separator.is-style-colorful::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 22%;
    height: 4px;
    background-color: #E13A44;
}

.wp-block-separator.is-style-colorful::after {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    width: 22%;
    height: 4px;
    background-color: #38ADF0;
}