table {
            border-collapse: collapse;
        }

        table, th, td {
            border: 0px solid black;
           
        }

        th, td {
            width: 40px;
            height: 30px;
            text-align: center;
            cursor: pointer;  
            background-position: center;
  background-repeat: no-repeat;
            
        }
                                                        
        td.ticked {
            background-color: #ccc;
        }

        #okayButton {
            margin-top: 10px;
            padding: 5px;
            cursor: pointer;
              
        }

        /*  Tab */
.colorsContainer {
    display: flex;
}
.tab-pane:first-child {
  display: block;
}