This color scheme is based on RasMol's shapely color scheme for nucleic and amino acids. There are two main differences:    
-     
colors are web-optimized    
 -     
some colors are darker in case of light background    
 
    
        
            
            
        
        
            
            | 
         0     
             | 
                
         UNK     
             | 
                
         medium purple     
             | 
                
         #ff00ff     
             | 
                
         #990099     
             | 
         
    
            | 
         1-2     
             | 
                
         A, +A     
             | 
                
         light blue     
             | 
                
         #9999ff     
             | 
                
         #333399     
             | 
         
    
            | 
         3-4     
             | 
                
         C, +C     
             | 
                
         light orange     
             | 
                
         #ff9933     
             | 
                
         #996600     
             | 
         
    
            | 
         5-6     
             | 
                
         G, +G     
             | 
                
         medium salmon     
             | 
                
         #ff6666     
             | 
                
         #993333     
             | 
         
    
            | 
         7-8     
             | 
                
         T, +T     
             | 
                
         light green     
             | 
                
         #33ff33     
             | 
                
         #33ff33     
             | 
         
    
            | 
         9-10     
             | 
                
         I, +I     
             | 
                
         medium purple     
             | 
                
         #ff00ff     
             | 
                
         #990099     
             | 
         
    
            | 
         11-12     
             | 
                
         U, +U     
             | 
                
         medium purple     
             | 
                
         #ff00ff     
             | 
                
         #990099     
             | 
         
    
            | 
         13     
             | 
                
         ALA     
             | 
                
         medium green     
             | 
                
         #99ff99     
             | 
                
         #66cc66     
             | 
         
    
            | 
         14     
             | 
                
         ARG     
             | 
                
         blue     
             | 
                
         #0000ff     
             | 
                
         #0000ff     
             | 
         
    
            | 
         15     
             | 
                
         ASN     
             | 
                
         light salmon     
             | 
                
         #ff6666     
             | 
                
         #993333     
             | 
         
    
            | 
         16     
             | 
                
         ASP     
             | 
                
         dark rose     
             | 
                
         #990033     
             | 
                
         #990033     
             | 
         
    
            | 
         17     
             | 
                
         CYS     
             | 
                
         medium yellow     
             | 
                
         #ffff66     
             | 
                
         #666633     
             | 
         
    
            | 
         18     
             | 
                
         GLN     
             | 
                
         dark salmon     
             | 
                
         #ff3333     
             | 
                
         #cc3333     
             | 
         
    
            | 
         19     
             | 
                
         GLU     
             | 
                
         dark brown     
             | 
                
         #660000     
             | 
                
         #660000     
             | 
         
         
             
             | 
                
        
        
            
            | 
         20     
             | 
                
         GLY     
             | 
                
         white     
             | 
                
         #ffffff     
             | 
                
         #000000     
             | 
         
    
            | 
         21     
             | 
                
         HIS     
             | 
                
         medium blue     
             | 
                
         #6666ff     
             | 
                
         #6666cc     
             | 
         
    
            | 
         22     
             | 
                
         ILE     
             | 
                
         dark green     
             | 
                
         #006600     
             | 
                
         #006600     
             | 
         
    
            | 
         23     
             | 
                
         LEU     
             | 
                
         olive green     
             | 
                
         #336633     
             | 
                
         #336633     
             | 
         
    
            | 
         24     
             | 
                
         LYS     
             | 
                
         royal blue     
             | 
                
         #3333cc     
             | 
                
         #3333cc     
             | 
         
    
            | 
         25     
             | 
                
         MET     
             | 
                
         light brown     
             | 
                
         #cc9933     
             | 
                
         #cc9933     
             | 
         
    
            | 
         26     
             | 
                
         PHE     
             | 
                
         olive gray     
             | 
                
         #666633     
             | 
                
         #666633     
             | 
         
    
            | 
         27     
             | 
                
         PRO     
             | 
                
         dark gray     
             | 
                
         #666666     
             | 
                
         #666666     
             | 
         
    
            | 
         28     
             | 
                
         SER     
             | 
                
         medium orange     
             | 
                
         #ff6633     
             | 
                
         #ff6633     
             | 
         
    
            | 
         29     
             | 
                
         THR     
             | 
                
         dark orange     
             | 
                
         #cc3300     
             | 
                
         #cc3300     
             | 
         
    
            | 
         30     
             | 
                
         TRP     
             | 
                
         olive brown     
             | 
                
         #666600     
             | 
                
         #666600     
             | 
         
    
            | 
         31     
             | 
                
         TYR     
             | 
                
         medium brown     
             | 
                
         #996633     
             | 
                
         #996633     
             | 
         
    
            | 
         32     
             | 
                
         VAL     
             | 
                
         light purple     
             | 
                
         #ff99ff     
             | 
                
         #ff99ff     
             | 
         
    
            | 
         33-34     
             | 
                
         ASX, GLX     
             | 
                
         medium purple     
             | 
                
         #ff00ff     
             | 
                
         #990099     
             | 
         
         
             
             |