stil dosyasına şunu ekle:

.fa-heart-half-empty{
background: #ffffff;
background: -moz-linear-gradient(left, #ffffff 0%, #efefef 50%, #ea7b0b 50%, #ea7b0b 71%, #ea7b0b 100%);
background: -webkit-linear-gradient(left, #ffffff 0%,#efefef 50%,#ea7b0b 50%,#ea7b0b 71%,#ea7b0b 100%);
background: linear-gradient(to right, #ffffff 0%,#efefef 50%,#ea7b0b 50%,#ea7b0b 71%,#ea7b0b 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#ea7b0b',GradientType=1 );
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;}

gülücük gelmiş oraya birleşik ": D" yap