body {
  background-color: lightblue;
}
#altcolchart{
    background: linear-gradient(to right, #0000ff, #ff0000);
    width: 300;
    color: white;
    text-align: center;
}
canvas{
  border:1px solid blue;
  background-color:white;
}

.actionbutton{
    background-color: whitesmoke;
    color:black;
}
.tickbox{
    cursor:pointer;
}
#messagep{
    display : block;
    width: max-content;
}