h3,h6{
text-align: center; 
}

table{
text-align: center; 
margin-left: auto;
margin-right: auto;
align:center;
width:120px;
height:300px;
border-collapse: collapse;
}

td{
background:linear-gradient(to right bottom, aquamarine 0, white 45%, white 60%, darkred 100%);
border: solid 2px black;
}