RGB – Gradient

      
        
          background: 
        
            linear-gradient(
        
              to left bottom,
        
              rgb(255,51,51) 0%,
        
              rgba(0,0,255,0) 70%
        
            ),
        
            linear-gradient(
        
              to right bottom,
        
              rgb(0,255,0) 0%,
        
              rgba(0,0,255,0) 70%
        
            ),
        
            linear-gradient(
        
              to left top,
        
              rgb(0,0,255) 0%,
        
              rgba(0,0,255,0) 70%
        
            ),
        
            linear-gradient(
        
              to top,
        
              rgb(255,255,255) 0% 100%
        
            );