Jump to content

Recommended Posts

I create an RGB/8 document and make a square that is RGB(0,0,255).  That's the exact colour I want to see.

How do I make the EXACT same colour in CMYK??????????  I use all kinds of online tools where you put in RGB and it spits out CMYK and put those values in and never comes out like I want.  The should not be difficult.  Someone show me simple, step by step please.  I've read all the stuff about why it's different blah, blah, blah.  Yea.  Just help me fix it please.

Link to post
Share on other sites

Welcome to the Affinity forums @brentjschaan

Sorry. Seriously? Do you read all the blahblah why it is different? You understood it? It is not difficult, it is simply impossible. Except someone invented a new printing technology and I did not notice.

We can only get approximately there. Or closer with a spot colour, but not with CMYK. Sorry.

------
Windows 10 | i5-8500 CPU | Intel UHD 630 Graphics | 8 GB RAM | Latest Retail and Beta versions of complete Affinity range installed

Link to post
Share on other sites

Welcome to the Serif Affinity Forums, @brentjschaan. :)

48 minutes ago, brentjschaan said:

I've read all the stuff about why it's different blah, blah, blah.

In that case, you should know that RGB is an additive colour model but CMYK is subtractive. RGB(0,0,255) is achieved by the emission of pure blue light (i.e. no red or green component) and the nearest you can get with CMYK is a combination of cyan and magenta (where those colours are reflected and the other components are absorbed). The gamut (or range of colours) for the CMYK colour space is much smaller than the gamut for RGB, so there are some colours — notably the brighter ones — for which you’ll never get a close match.

Alfred online2long.gif
Affinity Designer/Photo/Publisher for Windows 1.9.2 • Windows 10 Home (4th gen Core i3 CPU)
Affinity Photo for iPad 1.9.2 • Designer for iPad 1.9.2 • iPadOS 14.4.2 (iPad Air 2)

Link to post
Share on other sites

So you want brightest blue possible? In RGB display it is made with single blue component. CMYK does not offer single component for blue, so it must be made mixing two colours – cyan and red. As you may notice, mix of two components is never as bright as single one, not to mention that the more you add colour in subtractive system the darker the colour gets.

All replies written above apply.

Link to post
Share on other sites
3 minutes ago, brentjschaan said:

How then does versaworks take my RBG image and make it come out the exact same way on the printer.  That indicates it is possible at some level in some way.

If your RGB image falls completely (or mostly) within the gamut of the printer (which might exceed some CMYK gamuts if the printer has additional inks) then it's going to be reproduced well. That is a completely different thing to expecting RGB (0,0,255) to be reproduced in a CMYK gamut (which cannot be done).

Create an RGB image of a single 255 blue block, send that to your printer - it's not going to come out like it does on screen, because it's physically impossible.

Link to post
Share on other sites
34 minutes ago, brentjschaan said:

How then does versaworks take my RBG image and make it come out the exact same way on the printer.

Well that's a vendor specific RIP-software which is optimized for their own large-format inkjet Roland printers. So it's by far no mass market software solution for arbitrary home printers or the like.

roland.jpg.53f4ed98299e828b6c598e75d458ab72.jpg

☛ Affinity Designer 1.9.3 ◆ Affinity Photo 1.9.3 ◆ OSX El Capitan

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...

Important Information

Please note there is currently a delay in replying to some post. See pinned thread in the Questions forum. These are the Terms of Use you will be asked to agree to if you join the forum. | Privacy Policy | Guidelines | We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.