.ckeditor-accordion-container > dl dt > a {
    color: #fff;
    font-weight: normal;
    background-image: linear-gradient(to right, #082d69 , #35afb5);
}
.ckeditor-accordion-container > dl dt > .ckeditor-accordion-toggle:before, .ckeditor-accordion-container > dl dt > .ckeditor-accordion-toggle:after {
    background: #fff;
}
.ckeditor-accordion-container > dl dt.active > a {
    background-image: linear-gradient(to right, #35afb5 , #35b0b5);
}