*{font-family:monospace}body{height:100vh;display:flex;justify-content:center;align-items:center}.box{width:300px;height:300px;border:1px solid #ccc;margin-bottom:10px}.color-box{display:flex;align-items:center;gap:5px;width:300px;height:35px}.color-box div{border:1px solid #ccc;height:100%;flex:1;line-height:35px;padding-left:15px;font-size:18px}input{height:35px}.color-box button{height:100%;border:1px solid #ccc}h3{text-align:center;margin:15px 0;font-size:20px;text-transform:uppercase}
