Primary Colors - DPChallenge Forums

Sigma 24-70mm f/2.8 EX Aspherical DF for Canon

05/05/2003 04:29:53 PM · #51

Originally posted by bamaster:

Originally posted by magnetic9999:
has anyone mentioned Hitler yet? if not, i'd like to just throw him in ..

What color is aryan anyhow?

Depends when you use it,

'it is one of the ironies of history that Aryan, a word nowadays referring to the blond-haired, blue-eyed physical ideal of Nazi Germany, originally referred to a people who looked vastly different. Its history starts with the ancient Indo-Iranians, Indo-European peoples who inhabited parts of what are now Iran, Afghanistan, and India.'

magnetic9999

Canon EOS-20D

05/05/2003 04:47:02 PM · #52

Doorskidder

Fujifilm FinePix 2600Z

05/05/2003 08:15:01 PM · #53

in light theory, the three primary colors are red blue and green,if you spray water on your tv screen you will see a bunch of those colored dots. it has been over 20 yrs since i wet to high school but if i remember correctly white light is made from combining those three colors, all the other colors we see are the combination to any two in varying amount.
//websearch.cs.com/wmconnect/wmt_results.adp?query=colors%20of%20light&source=WMTLanding

since the members challenge states the primary colors for ink, paint etc. the mentioning of the ones for light theory is mute

Message edited by author 2003-05-05 20:17:32.

Canon EF 28-135mm f/3.5-5.6 IS USM

05/05/2003 09:10:07 PM · #54

Originally posted by Doorskidder:

Yeah, but like you'd see if you followed the first link you posted, the primary colors for ink, paint etc are cyan, magenta and yellow...

ScottK

Canon EOS-350D Rebel XT

05/05/2003 09:16:41 PM · #55

You bunch of color nazis! I'm color blind. I believe that primary colors are a myth perpetrated by the colorist people against the downtrodden, persecuted and oppressed color-challenge population. We will not stand for this bigotted challenge. We're loud, we're proud, and we wear a lot of grey!

Message edited by author 2003-05-05 21:17:41.

kosmikkreeper

Nikon D300s

Nikon AF-S DX NIKKOR 18-200mm f/3.5-5.6G ED VR II

05/05/2003 10:48:16 PM · #56

I'm thinking of having my girlfreind punch me in the eye and it should be red, blue and yellow in a few day!!! :-P

*no one was hurt during this posting

karmat

Apple iPhone 7

Canon EF 70-200mm f/4.0L USM

05/05/2003 10:51:34 PM · #57

Originally posted by ScottK:

ooooo, a grey challenge!!!!

OneSweetSin

Nikon D3000

05/05/2003 11:20:11 PM · #58

Originally posted by ScottK:

Hey you just take a red crayon, blue crayon and a yellow crayon out of the box and photograph them, can't go wrong as long as you read the side of the crayons to make sure you got the right colors...lol just joking, seriously you are the first post I read that didn't have an opinion of color theory...hey at least grey is neutral.

Hmmm can we have a NEUTRAL color challenge next you know the grey, navy, black and white challenge....

magnetic9999

Canon EOS-20D

Sigma 24-70mm f/2.8 EX Aspherical DF for Canon

05/06/2003 09:00:10 AM · #59

hmm....

is it spelled 'grey' or 'gray' ??? are they the same thing?

;D

Jak

Fujifilm FinePix S602Z

05/06/2003 09:24:46 AM · #60

"Gray" is the rather odd American spelling of the English word "grey".

dsidwell

Canon EOS-5D

Canon EF 17-40mm f/4.0L USM

05/06/2003 09:27:21 AM · #61

Perhaps one of our UK friends could clear up "gray" vs. "grey." I believe in the U.S. we spell it "gray" while in the King's English, it is "grey."

I'm with ScottK! I'm colorblind, too! Luckily, I have a seeing-eye wife.

05/06/2003 09:27:43 AM · #62

Originally posted by Jak:

"Gray" is the rather odd American spelling of the English word "grey".

But which grey ? 8 bits per channel, 24 bits per pixel gives a choice of 256 levels of grey. I don't know which one to use......!

OneSweetSin

Nikon D3000

05/06/2003 09:44:22 AM · #63

Originally posted by Gordon:

Originally posted by Jak:
"Gray" is the rather odd American spelling of the English word "grey".

But which grey ? 8 bits per channel, 24 bits per pixel gives a choice of 256 levels of grey. I don't know which one to use......!

Pick level 128, right in the middle, then no one can complain!

PHOTOCHlX

Fujifilm FinePix 2600Z

05/06/2003 10:07:39 AM · #64

For those of you who can't decide what primary colors are refill your colored ink cartridge on your printer and then tell me what 3 colors of ink are used to reproduce your images on paper? You won't find Green, green is a color of light! RED, YELLOW, and BLUE are what you will find.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

05/06/2003 10:14:52 AM · #65

Originally posted by PHOTOCHlX:

What you'll find in an ink cartridge (or printing press) are Cyan (a blueish-green), Magenta (a purplish red) and Yellow. A lot of people somewhat sloppily refer to the Cyan ink as "blue" and the Magenta as "red," but these are not accurate descrptions. Printers/presses also use Black ink, as the pigments are not pure enough to yield a true black when all three colors are combined.

PHOTOCHlX

Fujifilm FinePix 2600Z

05/06/2003 10:17:21 AM · #66

Originally posted by GeneralE:

Originally posted by PHOTOCHlX:
For those of you who can't decide what primary colors are refill your colored ink cartridge on your printer and then tell me what 3 colors of ink are used to reproduce your images on paper? You won't find Green, green is a color of light! RED, YELLOW, and BLUE are what you will find.

What you'll find in an ink cartridge (or printing press) are Cyan (a blueish-green), Magenta (a purplish red) and Yellow. A lot of people somewhat sloppily refer to the Cyan ink as "blue" and the Magenta as "red," but these are not accurate descrptions. Printers/presses also use Black ink, as the pigments are not pure enough to yield a true black when all three colors are combined.

My printer doesn't use black ink! The black comes from the 3 colors in the cartridge.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

05/06/2003 10:40:00 AM · #67

Originally posted by PHOTOCHlX:

My printer doesn't use black ink! The black comes from the 3 colors in the cartridge.

Are you able to get a sharp black from that? How does black type look?

On offset presses, the black you typically get from the other three inks is kind of muddy and brownish. Also you have to print them all solid, which is difficult and expensive. Usually, a calculation is done to remove some of the three color inks and replace with an equivalent amount of black ink.

There used to be an interesting exhibit at the Graphic Arts Institute in San Francisco. It was just a frame with about 70 small swatches of paper which had each been printed with "black" ink, each one a different color.

StevePax

Canon PowerShot S50

05/06/2003 11:44:04 AM · #68

Originally posted by OneSweetSin:

Originally posted by Gordon:
But which grey ? 8 bits per channel, 24 bits per pixel gives a choice of 256 levels of grey. I don't know which one to use......!

Pick level 128, right in the middle, then no one can complain!

Oh no, as we all know, here at DPC, someone can, and will, complain! :?)

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

05/06/2003 11:48:03 AM · #69

Isn't 8-bit = 256 shades? 24-bit approx.= 16.7 million?

Kavey

Canon EOS-400D Rebel XTi

Sigma 18-125mm f/3.5-5.6 DC for Canon

05/06/2003 11:50:10 AM · #70

Originally posted by GeneralE:

Originally posted by PHOTOCHlX:
My printer doesn't use black ink! The black comes from the 3 colors in the cartridge.

Are you able to get a sharp black from that? How does black type look?

On offset presses, the black you typically get from the other three inks is kind of muddy and brownish. Also you have to print them all solid, which is difficult and expensive. Usually, a calculation is done to remove some of the three color inks and replace with an equivalent amount of black ink.

This is exactly what I used to explain to my students back when I used to teach advanced QuarkXPress. An occasional student would get really hung up on the fact that Cyan Magenta and Yellow, when combined equally, should produce black - and I really had to work hard to explain that Cyan, Magenta and Yellow inks used for printing were not uniform enough to actually achieve a good black in reality. Not to mention the effect on most types of paper of printing 100% solid blocks of 3 different inks! Hence CMYK - Cyan Magenta Yellow and Black four colour printing presses.

Message edited by author 2003-05-06 11:52:30.

05/06/2003 11:52:20 AM · #71

Originally posted by GeneralE:

Isn't 8-bit = 256 shades? 24-bit approx.= 16.7 million?

8 bits per channel (gives you 0-255 levels each for red, green and blue)

These combine to be 2^24 possible RGB triples, but for a pure grey Red==Green==Blue, so you are back to only 2^8 or 256 choices for grey.

StevePax

Canon PowerShot S50

05/06/2003 11:52:52 AM · #72

.

Message edited by author 2003-05-06 11:55:23.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

05/06/2003 11:55:33 AM · #73

Gordon -- Yeah, that's what I meant too...I think Photoshop can work in 12- and 16-bit/channel mode as well, but I've never tried it because those modes are not supported in PostScript -- my primary output mode...

Message edited by author 2003-05-06 11:55:50.