div {
 height: 120px;
 width: 120px;
 border-radius: 90% 5% 75% 5%;
 margin: auto;
 margin-bottom: 5px; 
}

#red-box {
 background: linear-gradient(25deg, #730000, #ff7d7d); 
}

#orange-box {
 background: linear-gradient(25deg, #a34600, #ffb57d); 
}

#yellow-box {
 background: linear-gradient(25deg, #c2b400, #fff56e); 
}

#green-box {
 background: linear-gradient(25deg, #008c10, #75ff85); 
}

#blue-box {
 background: linear-gradient(25deg, #00008a, #5c77ff); 
}

#indigo-box {
 background: linear-gradient(25deg, #4d0080, #a578ff); 
}

#violet-box {
  background: linear-gradient(25deg, #7c0085, #e48cff);
}