Just not sure what to do with this information-I guess it's used in soft proofing but sure how all this works. so do I convert my sRGB to CMYK, work to fix different color issues using some of the methods above, then what? Where does the printer's profile come into play during all of this? UPrint told me for offset printing they use US Web-coated SWOP v.2. I have spent the weekend trying to educate myself on color-management-oh my goodness! But your suggestions here have already helped make a difference with the first converted CMYK image I am working on-so THANK YOU! The initial proof was disappointing to say the least. Hello, I just happened upon this discussion after trying to solve the same issue with a brochure I am sending to UPrint. But it should get you started.Īuthor, CMYK 2.0: A Cooperative Workflow for Photographers, Designers, and Printers

This is the VERY short version of what can be a VERY long story. Note: you'll not remove ALL of the contaminating colors the goal is to reduce them. You should see the effect change on screen in real time.

While looking at the #1 readout on the Info Panel, use the sliders to reduce the contaminating color(s). There are many ways to manipulate a color in a CMYK file.Īn easy way is to add a Selective Color adjustment layer which allows you to add or subtract ink from a specific color.Ĭlick on the Colors pop-up and choose Blues.Īt the bottom of the panel, click the Absolute radio button. The goal in making blue more vibrant is to reduce the level of the contaminating color(s). Of course, a lighter blue will have over-all lower ink percentages. Yellow will 'dirty' it up, and black will darken it. Any amount of the contaminating colors (in this case, yellow and black) will reduce the vibrancy. The most vibrant blue (like a sky blue) in the CMYK color space will be 100% cyan (100C) and about 70% magenta (70M). The Info Panel readout will show you the C, M, Y, and K ink values (precentages) of that point in the image. You'll see that read out in the Info Panel as '#1'. Then, place a color sampler point in the blue area of the image. Do your conversion, close the RGB file and work on the CMYK file.

First, don't waste time comparing the vibrant blue in the RGB file to the converted blue in the CMYK file it'll just get you depressed.

Convert rgb colors to cmyk