brentjschaan Posted February 18, 2021 Share Posted February 18, 2021 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. Quote Link to comment Share on other sites More sharing options...
Joachim_L Posted February 19, 2021 Share Posted February 19, 2021 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. Quote ------ Windows 10 | i5-8500 CPU | Intel UHD 630 Graphics | 32 GB RAM | Latest Retail and Beta versions of complete Affinity range installed Link to comment Share on other sites More sharing options...
Alfred Posted February 19, 2021 Share Posted February 19, 2021 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. Quote Alfred Affinity Designer/Photo/Publisher 2 for Windows • Windows 10 Home/Pro Affinity Designer/Photo/Publisher 2 for iPad • iPadOS 17.4.1 (iPad 7th gen) Link to comment Share on other sites More sharing options...
v_kyr Posted February 19, 2021 Share Posted February 19, 2021 Quote ☛ Affinity Designer 1.10.8 ◆ Affinity Photo 1.10.8 ◆ Affinity Publisher 1.10.8 ◆ OSX El Capitan ☛ Affinity V2.3 apps ◆ MacOS Sonoma 14.2 ◆ iPad OS 17.2 Link to comment Share on other sites More sharing options...
Fixx Posted February 19, 2021 Share Posted February 19, 2021 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. Quote Link to comment Share on other sites More sharing options...
brentjschaan Posted February 19, 2021 Author Share Posted February 19, 2021 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. Quote Link to comment Share on other sites More sharing options...
v_kyr Posted February 19, 2021 Share Posted February 19, 2021 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. Quote ☛ Affinity Designer 1.10.8 ◆ Affinity Photo 1.10.8 ◆ Affinity Publisher 1.10.8 ◆ OSX El Capitan ☛ Affinity V2.3 apps ◆ MacOS Sonoma 14.2 ◆ iPad OS 17.2 Link to comment Share on other sites More sharing options...
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