RGB Values for Macbeth Color Checker

RGB Values for GretagMacbeth (Macbeth) Color Checker

One might argue this is one of the most boring pages on the whole internet. I mean really, RGB values for a bunch of squares?

But when I bought my ColorChecker card, it comes with a little pamphlet giving the RGB values for the color patches, and I just know I'm going to lose that pamphlet. Ergo, this web page.

Patch # Patch Color Red Green Blue

1 dark skin 94 28 13

2 light skin 241 149 108

3 blue sky 97 119 171

4 foliage 90 103 39

5 blue flower 164 131 196

6 bluish green 140 253 153

7 orange 255 116 21

8 purplish blue 7 47 122

9 moderate red 222 29 42

10 purple 69 0 68

11 yellow green 187 255 19

12 orange yellow 255 142 0

13 blue 0 0 142

14 green 64 173 38

15 red 203 0 0

16 yellow 255 217 0

17 magenta 207 3 124

18 cyan 0 148 189

19 white (.05) 255 255 255

20 neutral 8 (.23) 249 249 249

21 neutral 6.5 (.44) 180 180 180

22 neutral 5 (.70) 117 117 117

23 neutral 3.5 (1.05) 53 53 53

24 black (1.50) 0 0 0

Comments

Andrew Dart unverified user 22 Jan 2005	I have added a link to your page from my Macbeth Color Checker page at http://www.akdart.com/macbeth.html Have a great weekend!

Donald unverified user 27 Mar 2005	You may find Bruce Lindbloom's site interesting... http://www.brucelindbloom.com/index.html?ColorCheckerRGB.html Cheers!

matthias unverified user 5 Apr 2005	check out http://www.babelcolor.com/main_level/download.htm

Bob unverified user 17 Jun 2005	Very useful thank you.

Jeremy van Nieuwkerk unverified user 27 Oct 2005	saved our ass. thanks.

Steve Bingham unverified user 7 Nov 2005	Just what I was looking for - as I lost mine!!!!!!! Steve Bingham www.dustylens.com

John unverified user 26 May 2006	Thank You for the RGB values :+)

Jason Heym unverified user 8 Aug 2006	I just received a new Macbeth color checker from B&H and the RGB values printed in the included instruction sheet are different from yours... 115 82 68 194 150 130 98 122 157 87 108 67 133 128 177 103 189 170 214 126 44 80 91 166 193 90 99 94 60 108 157 188 64 224 163 46 56 61 150 70 148 73 175 54 60 231 199 31 187 86 149 8 133 161 243 243 242 200 200 200 160 160 160 122 122 121 85 85 85 52 52 52 These are listed as sRGB (standard RGB). My color correction results are significantly better using these RGB values. -Jason

David unverified user 14 Nov 2006	Hi! The colors on the last post were for the sRGB colorspace. The ones listed above are for what RGB colorspace?

Darren verified user 16 Nov 2006	Well, I'm not sure. When I made this page, I just knew I was going to lose the sheet. And guess what, I lost it. Now that I know more about colour correction, I realize I should have put up the LAB numbers too... dang.

hansen unverified user 20 Dec 2006	I do color correction in digital camera, which use 33 matrix . But if use Lab data, how to get the best 33 color matrix.

robert unverified user 18 Mar 2007	hi all. nice blog. its very ineresting article.

alex unverified user 13 Apr 2007	hi nice site.

Gerhard (South Africa) unverified user 7 May 2007	Cheesh guys , you don't know how this chart is helping me on Digital Film and Digital SLR camera (only discovered what a Macbeth colour chart was all about) shame on me !! Thanx a stack !!

Terence unverified user 28 May 2007	Are there more than one set of RGB values for different color spaces on the sheet that comes with the color checker? I have a Macbeth Color Checker Chart, but it is some 35 years old, purchased before there were computers to do image processing in a home, so no such data sheet was supplied then. Plugging the RGB value for dark skin provided in the comment by Jason Heyem 115, 82, 68 into Photoshop set for sRGB and then converting it to CIE RGB using the Adobe ACE engine and the absolute colorimetric setting, I get the values 110, 85, 72. The Lab values remained the same 38, 13, 14 for both. The other question this brings up is: does the supplied data sheet represent values generically for all the gretagmacbeth charts, or does it, as there probably are some manufacturing variations, represent the values for a specific batch of charts, or even the specific chart that it in the package? There does not seem to be any useful information about this on the x-rite gretagmacbeth web site.

Darren verified user 29 May 2007	Hi Terrance; 1. Well, I lost my sheet a long time ago, so I can't remember if there was more than one color space on it. 2. I'm _assuming_, that like an IT-8 target, the sheet is for the colours of a particular production run of cards. On the other hand, given that the card is supposed to be a "standard" target, there shouldn't be that much variation.

Darren verified user 29 May 2007	And Terence, sorry for spelling your name wrong in the previous comment!

Rube unverified user 10 Jul 2007	Hi Darren Really stupid question, but how do you actually use the colourchecker card? I know to have it in the photo or test photo, and I know how to save the values for white, grey and black in Levels, Raw or Curves using the white, black and grey colour pickers in Photoshop and then applying them to the white, black and grey areas of my photos....and that works well, but I just can't work out how I can sensibly use the other colours...what you (the professionals)do? Other than eyeball the chart against the chart in the image? Thanks, Ruby

Darren verified user 10 Jul 2007	In my view, there's two different things you can do with a colour checker card: You can colour balance, and you can colour match. Colour balancing is what you do most of the time, and is done using the black/grey/white line like you described. Colour matching is generally only needed for catalog work. Say you're shooting a teal shirt for a catalog. If you have the colour wrong in the catalog, you'll might end up with people returning the shirt saying "it's not the colour it was in the catalog." So you'd take a picture of the shirt with the colour correcter, and then after colour balancing, adjust the colour to the teal square, since it's the closest to the shirt. Then you could also manually compare the (real) shirt and the (real) card to the photo to make sure the relationship is correct. Disclaimer: I've never done catalog work, so this is just my understanding from talking to people who have.

Nigel Fraser Ker unverified user 8 Aug 2007	I'm glad I'm not the only person who doesn't understand all this stuff. What I want is a simple process I can use to get reliable reproduction on prints. I want to take a picture (with a Colorchecker or grey card in the photo if necesary), use photoshop to adjust the balances and then send the file off to a standard print shop knowing that what they print is what I saw. I know that this is vastly simplifying an enormousy complicated subject. I wonder if there is a 'Color for Dummies' book!

felix unverified user 4 Sep 2007	Since you have the RGB value of all colors printed on the card you can match the colors with a curve or other adjustment layers (and then correct your real image/footage with the same setting). For example, you should get(with the color picker) the RED spot of the card to 255, 0, 0 to ensure your reds are clean. You can do the same for other channels. If you are in the CMYK world, youll notice you also have the four channel presented on the card. Dan Margulis wrote a chapter about how to adjust by the numbers. Felix http://photo.felixmenard.com http://www.flickr.com/photos/_f/

pjde ptadq unverified user 15 Nov 2007	tkrfjmlxe cfwbs zqml cdpm teluydvm svmobkx kdaipg

pjde ptadq unverified user 15 Nov 2007	tkrfjmlxe cfwbs zqml cdpm teluydvm svmobkx kdaipg