.custom_block_btn,
.acf-block-preview .custom_block_btn{
    color : #ffffff !important;
    background-color : #8f02d6;
    border: 4px solid #8f02d6;
    border-radius : 5px;
}
.custom_block_btn:hover{
    color : #ffffff !important;
    background-color : #777;
    border-color: #777777;
}

@media only screen and (max-width: 500px){

}