Template:Color/styles.css

.color-box {
    display: inline-flex;
    border-radius: 4px;
    border: 1px solid black;
    margin: 0;
    padding: 2px;
    background: #eee;
}

.color-box > span {
    margin: 0;
}

.color-text {
    color: black;
    background-color: white;
    border-radius: 4px 0 0 4px;
    font-family: monospace;
}

.color-fill {
    width: 1.75em;
    border-radius: 0 4px 4px 0;
}