halftones

#000000 --> "black"
#000001 --> "very very very very very very very very dark gray"
#000002 --> "very very very very very very very dark gray"
#000003 --> "very very very very very very dark gray"
#000004 --> "very very very very very dark gray"
#000005 --> "very very very very dark gray"
#000006 --> "very very very dark gray"
#000007 --> "very very dark gray"
#000008 --> "very dark gray"
#000009 --> "dark gray"
#00000A --> "gray"
#00000B --> "light gray"
#00000C --> "lighter gray"
#00000D --> "still lighter gray"
#00000E --> "much lighter gray"
#00000F --> "extremely light gray"
#000010 --> "gray so light it hurts"
#000011 --> "gray so light you can't believe it's not white"
#000012 --> "oh my god, that gray is so light it made my computer explode"
#000013 --> "nothing could possibly be lighter than this gray"
...
#FFFFFE --> "not white"
#FFFFFF --> "white"

happy web '99 via cpb