Well, since I added my question, I made changes which is just a workaround trying to hide the two horizontal bars. They are lightly displayed now, but I really want them removed so I can use the color of fonts and background that I want.
.widget {
background-color: white;
font-size:14px;
}
#wp-calendar #today {
background-color: #C8C8FF;
}
#wp-calendar{
color:#000000;
font-weight: bold;
}
#wp-calendar td {
color: black;
font-weight: bold;
font-size:16px;
}