![]() Check the 'Summary' for an exclamation mark next to ‘Links and Images’ (as shown below). InDesign will flag any RGB colours and images when you package the files to supply the artwork. How to check for RGB colours in Adobe InDesign Any RGB colours will need to be converted to CMYK in your artwork. ![]() *If your artwork also contains spot colours that you want to print as separate plates, then make sure that you use the setting ‘No Colour Conversion’. As shown below, select ‘Convert to Destination’ for Colour Conversion and then select the Destination profile that your printer requires, in this example ‘Coated Frogra39 (ISO 1267-2:2004)’ is selected. How to convert RGB colours when creating a PDFįortunately in Adobe Acrobat, unless you are also using spot colours*, this is as easy as changing the output options. This will not only give you a better idea of how the colours will look when they are printed but will avoid any problems with colour shifts that may occur. If you are supplying artwork in its original format, such as InDesign or QuarkXPress, then it is better to convert colours to CMYK before supplying artwork and files. If you are supplying artwork as a high resolution, press ready PDF then this conversion can be done when creating the PDF. This applies to any colours used in the artwork and to the imported images and files. RGB colours may look good on screen but they will need converting to CMYK for printing.
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