.container {
    position: relative;
    width: 100px;
    float: left;
    margin-right: 50px;
}
  
.image {
    opacity: 1;
    display: block;
    width: 100%;
    height: auto;
    transition: .5s ease;
    backface-visibility: hidden;
}
  
.middle {
    transition: .5s ease;
    opacity: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    text-align: center;
    width: 140px;
}
  
.container:hover .image {
    opacity: 0.3;
}
  
.container:hover .middle {
    opacity: 1;
}
  
.text {
    background-color: #1b9ebc81;
    color: white;
    font-size: 12px;
    padding: 16px 32px;
}

h1 .anchor span {
    color: #BC561B;
}

.sidebar ul li.active>a {
    color: #BC561B;
}

.markdown-section a {
    color: #BC561B;
}