RGBs.css

body {
    background-color: #232323;
    margin: 0;
    font-family: 'Play', sans-serif;
}

.square {
    width: 100%;
    background-color: purple;
    border: 2px solid rgba(255, 255, 255, 0.5);
    margin: 1.66%;
    border-radius: 45%;
    transition: background-color 0.5s;
    -webkit-transition:background-color 0.6s;
    -moz-transition:background-color 0.6s;
    -ms-transition:background-color 0.6s;
    -o-transition:background-color 0.6s;
}

.square:after {
    content: "";
    display: block;
    padding-bottom: 100%;
}

.square:hover{
    cursor: pointer;
    border: 5px solid white;
    transition: border 0.5s;
}

#wrapper {
    margin: 10px auto;
    max-width: 600px;
}

h1 {
    text-align: center;
    color: white;
    line-height: 1.1;
    margin: 0;
    font-weight: normal;
    text-transform: uppercase;
    padding: 20px 0;
}

.cool-gradient {
    background: #00B4DB;
    /* fallback for old browsers */
    background: -webkit-linear-gradient(to bottom, #0083B0, #00B4DB);
    /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to bottom, #0083B0, #00B4DB);
    /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}

#colorDisplay {
    font-size: 20px;
}

.stripe {
    background-color: #232323;
}

.stripe-correct{
    color: white;
    background-color: #408939;
    font-size:20px;
    text-align: center;
}

.stripe-wrong {
    color: white;
    background-color: #C93933;
    font-size:20px;
    text-align: center;
}

#message {
    background-color: rgb(35, 35, 35, 0.5);
    font-size: 30px;
    padding: 0 80px;
    display: inline-block;
}

#reset{
    margin:10px 0;
    border-top-left-radius: 0.5rem;
    border-top-right-radius: 0rem;
    border-bottom-right-radius: 0rem;
    border-bottom-left-radius: 0.5rem;
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-right: none;
}

button {
    text-transform: uppercase;
    letter-spacing: 1px;
    outline: none;
}

button:hover{
    cursor: pointer;
}