What is the difference between purple, violet and indigo?
484659
purple = 50 percent blue, 50 percent red\nviolet = 33 percent blue, 33 percent red, 33 percent white\nindigo = indigo is just dark blue ...
137227
what is an indigo child?!?!
296377
a regular, garden variety VIOLET, lol.
194311
apparently it's orange, purple, silver n month, but on QI I think they found a rhyme for orange.\n\nI found a source with a couple of others:
564380
http://images.google.com/images?sourceid=navclient&ie=UTF-8&rls=RNWE,RNWE:2004-41,RNWE:en&q=purple+ribbon
168135
I have 2...one is purple and the other is emerald green...why??? purple I have always liked and emerald green is a color that I look good in....
1174899
Green \n\nor maybe blue
268923
turquoise!! i luv that color it is bluish and greenish. my sister and i made up a color similar called aquaquoise.
1128839
I don't think that most people would really be able to tell the difference between a dark bluish-purple from indigo...they are too similar! I have also heard that the person who constructed the visual spectrum (I can't recall who) liked to have things arrainged in a group of seven, and this may be why indigo is even listed as a color in it's own right. That's why we have Roy G. Biv: red orange, yellow, green, blue, INDIGO, and violet.
594161
purple\nfont vivaldi is my favorite font
725873
Which violet ??????????
1003025
im getting purple and green!!!
705134
Refer to the reference for the structures.  The indigo is a relatively nonpolar molecule so it is insoluble in water.  The leuco form is a disodium salt and therefore soluble in water.
995857
It's all about the color spectrum- ROYGBIV- And think more Blue, Indigo, Violet , more insects. More red, orange- less insects.\n\nMost insects see better in UV and are thus generally attracted to \nshort wave lengths toward that end of the spectrum. Insects do not see in the red end of the spectrum.
1150818
All other common amino acids have a primary amino group. The primary amino group is essential for the formation of the purple chromophore.\nProline has a secondary amino group so the reaction is different\n\nHave a look at the link below
113274
I love hot purple. I am attracted to bright colors. Hot purple is a COOL COLOR it is a calm color, but yet at the same time a cheerful color:)
806627
This is partially true, partially false.\n\nWith regards to purple, most people would agree that purple light is always some mixture of reddish and bluish light.   I.e. you can imagine two knobs, one raising and lowering the red and the other raising and lowering the blue, and you can get many shades of purple.  There may be other hues added in as well, but there is *always* red and blue (if not, we rarely call it purple).\n\nIn other words, if we didn't have the word "purple" in our language, we would probably call it something like "reddish blue" or "bluish red".\n\nBut we cannot do the same with red and green.   We have a very hard time imagining, or pointing to, a color that is "reddish green".  If given only a red and a green knob, the result will be make the color more or less neutral (gray or white).\n\nLikewise with blue and yellow.  (Some people will respond that green is bluish yellow, but that's because many people are used to mixing pigments on paper ... we're talking about mixing lights.)\n\nThese two pairs,  red-green and blue-yellow, are *fundamental* pairs.  We call them "oppositional".  (There is also a third opponent pair ... light-dark ... but as we're just talking about color here, we can ignore that one for the moment.)  This is called the "opponent theory" of color vision and is associated with Ewald Hering.\n\nSo in that sense we can call these four colors "fundamental" hues"  because all color we see can be mixed using knobs of these four colors.\n\nPeople will also wonder about the red-green-blue primaries, and the fact that we know we have red, green, blue photoreceptors in our eyes.  These would also seem to be fundamental hues (as evidenced by the computer monitor on which you are reading these words ... that monitor is able to simulate a wide range of colors using just red, green, and blue).\n\nThese two theories ... the "opponent theory" and the "trichromatic theory" competed for a long time until we found a way to reconcile them.  Basically, we have three types of photoreceptors, but they are wired in a way in our retina, that by the time signals are travelling down our optic nerve, the red-green are antagonistic signals as are yellow-blue.