Can I color table columns using CSS without coloring individual cells?

Answer 1

You can use the nth-child selector for that:

tr td:nth-child(2),
tr td:nth-child(3) {
  background: #ccc;
}

  

    
headline 1
    
headline 2
  
  

    
column 1
    
column 2
    
column 3
  
  

    
column 1
    
column 2
    
column 3
  
  

    
column 1
    
column 2
    
column 3