.mceContentBody{
    /*color: blue;*/
    /*background-color:*/
    /*.h4{background-color: red}*/
}

.mceContentBody .h4, h4, .h5, h5, .h6, h6{
    color: #0E303D;
    font-weight: 400;
    margin-bottom: 1rem;
}

.mceContentBody .h4, h4{ font-size: 130%; }
.mceContentBody .h5, h5{ font-size: 120%; }
.mceContentBody .h6, h6{ font-size: 110%; }

.mceContentBody strong{
    font-weight: 600;
}