#container {background-color: white; height: 100%; width: 100%; display: flex; flex-direction: column; justify-content: center; align-items: center;}
#colorC { height: 40px; width: 40px; background-color: red; border: 4px solid black; border-radius: 45%;}
#btn1 { height: 35px; width: 35px; border: 2px solid black; border-radius: 45%;}