HTMLify

* {
    margin: 0;
    padding: 0;
}

body {
    background: #151515;
    color: #fff;
    display: grid;
    place-items: center;
    height: 100vh;
}

.switch {
    position: relative;
    width: 14rem;
    padding: 0 1rem;
    font-family: verdana;
}

.switch::before {
    content: "  ";
    position: absolute;
    left: 0;
    z-index: -1;
    width: 100%;
    height: 3rem;
    background: #333;
    border-radius: 30px;
}

.switch__label {
    display: inline-block;
    width: 2rem;
    padding: .9rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: color 200ms ease-out;
}

.switch__label:hover {
    color: white;
}

.switch__indicator {
    width: 4rem;
    height: 4rem;
    position: absolute;
    top: -0.5rem;
    left: 0;
    background: blue;
    border-radius: 50%;
    transition: transform 600ms cubic-bezier(0.02, 0.94, 0.09, 0.97), background 300ms cubic-bezier(0.17, 0.67, 0.14, 1.03);
    transform: translate3d(1rem, 0, 0);
}

.switch input#one:checked~.switch__indicator {
    background: PaleGreen;
    transform: translate3d(1.2rem, 0, 0);
}

.switch input#two:checked~.switch__indicator {
    background: MediumTurquoise;
    transform: translate3d(5.5rem, 0, 0);
}

.switch input#three:checked~.switch__indicator {
    background: PaleVioletRed;
    transform: translate3d(10.6rem, 0, 0);
}

.switch input[type=radio]:not(:checked),
.switch input[type=radio]:checked {
    display: none;
}