Color sample

  明るさ →
#000000
(black)
    #777777
(gray)
#BBBBBB
(silver)
  #FFFFFF
(white)
  #770000
(maroon)
#FF0000
(red)
#FF7700 #FF7777    
#FF0077
  #007700
(green)
#00FF00
(lime)
#77FF00 #77FF77    
#00FF77
  #000077
(navy)
#0000FF
(blue)
#7700FF #7777FF    
#0077FF
    #777700
(olive)
  #FFFF00
(yellow)
#FFFF77  
    #770077
(purple)
  #FF00FF
(fuchsia)
#FF77FF  
    #007777
(teal)
  #00FFFF
(aqua)
#77FFFF