* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  height: 100vh;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;

  background-color: whitesmoke;
}

#coolors {
  width: 400px;
  height: 200px;
  padding: 5px;
  background-color: rgb(41, 41, 41);
  display: flex;
}

#coolors div {
  width: 100%;
  height: 100%;
  cursor: pointer;
  transition: 0.2s;
}