The reason you get different colors when you paste the same values into different RGB spaces is that each RGB space is unique. Although the same color may exist in each of those spaces the colors are in different locations within the space. Therefore when you paste the same coordinates (color numbers) into each space it references a different color. Probably a similar color but different. In some instances the difference can be dramatic. To get the same color you would have to convert the numbers to the representative color in the new space. This is what the Convert to Profile command does within Photoshop. Regards, Rob Brooks Institute, Faculty rwinner@brooks.edu ________________________________________ From: colorsync-users-bounces+rwinner=brooks.edu@lists.apple.com [colorsync-users-bounces+rwinner=brooks.edu@lists.apple.com] on behalf of Jon Meyer [jonmeyer@grafixgear.com] Sent: Monday, March 30, 2015 4:36 PM To: Mark Franzen Cc: colorsync-users@lists.apple.com Subject: Re: Pantone RGB/CMYK values sRGB Mark. See PantoneLIVE for L*a*b* values. Jon Sent from my iPhone
On Mar 30, 2015, at 7:07 PM, Mark Franzen <mfranzen3@wi.rr.com> wrote:
Hello -
I am sure this question has been asked before, but I need to ask it again anyway.
I am wondering about the RGB and CMYK values that are give by Pantone in their “Color Bridge” book and elsewhere. It has the Solid swatch and a CMYK process swatch. Under those swatches are RGB and CMYK values. I fully understand the differences between the solid and process colors, but I am a little unclear as to WHICH RGB and CMYK those numbers are referring. Why would those numbers not be given in L*a*b?
I did see in the first few pages of the Pantone book that sRGB was referenced, and I am assuming that when Pantone gives RGB numbers, at least in the book that I am referencing, that those numbers relate to sRGB - maybe I am answering my own question there.
I did also read that the CMYK “screen tint” percentages were given. How do those numbers relate to a CMYK file that I could use in Photoshop?
If I create a new Photoshop file in sRGB, Adobe RGB (1998), and ColorMatch and fill each those with the numbers called out, I get three images with very different color appearances. I also did the same thing with three different CMYK files. I was using Pantone Red 032C for my test. RGB values in the book were R-237 G-41 B-57. I also understand that each RGB and CMYK is going to have their own gamut and “flavor”, but my question is, which one is right?
Thanks for the help.
Mark Franzen mfranzen3@wi.rr.com
_______________________________________________ Do not post admin requests to the list. They will be ignored. Colorsync-users mailing list (Colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/jonmeyer%40grafixgea...
This email sent to jonmeyer@grafixgear.com
_______________________________________________ Do not post admin requests to the list. They will be ignored. Colorsync-users mailing list (Colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/rwinner%40brooks.edu This email sent to rwinner@brooks.edu