On a PDF Export you can convert all of the document’s CMYK colors to RGB by choosing an RGB Destination profile in the Export Output tab. An Export to Interactive PDF will automatically convert all color to sRGB. Or, if you want to change the document colors—select Add Unnamed Colors from the Swatches flyout, and then select all of the To change the Color Mode of the default swatches choose Edit>Document Setup and set the Intent to Print—the blend space affects how transparency will get flattened on export or output, but doesn’t affect the actual Color Mode of a swatch. Make sure that all images are RGB and that they all have the same color profile. Make sure that the darkest point of every image is RGB(0, 0, 0). In InDesign. Make sure that Document RGB is the same profile as used in the images. Place RGB images in InDesign. Use an RGB(0, 0, 0) swatch for the dark areas. Convert to the correct CMYK profile on In the new document dialog box, if the Intent is set to Print, the color space will automatically be set to CMYK. If the intent is Web or Mobile, it will be RGB. A document can also be converted from CMYK to RGB by going to the Color panel menu. The default color mode is established when you create the document. Fortunately, InDesign makes it easy: Choose File > Export, then choose JPEG from the Format pop-up menu. When you export in the JPEG format, InDesign always converts all your colors (including CMYK and spot colors) to RGB. There can be problems with converting InDesign native colors, that you have to consider. Any black or gray colors built with black only will convert to 3- or 4-color (with the exception of the default [Black]). Pure primary colors like 100% cyan or 100% yellow might get "contaminated" with other colors. And yes once you do that you will not be Should I make black text then CMYK still even though I will export it to RGB too? What’s the printing method? If it is offset printing you would want black text to be CMYK 0|0|0|0 in the final PDF and that won’t happen if the text starts as RGB black. If the output is to an RGB driven composite de If you want to color manage the conversion of an HTML hex color to the closest FOGRA39 CMYK version of the color (#FF5050 is out-of-gamut to most CMYK spaces), set the InDesign source RGB profile to sRGB (modern web browsers display HTML hex values as sRGB) and the destination CMYK profile to FOGRA39 via Edit>Assign Profiles. You cannot convert between RGB and CMYK without some amount of color difference of some sort. It’s a good idea to do test prints of your work with a high quality printe r to see how your colors turn out. Also, talk with your print provider to see if they have suggestions given their knowledge of their own printers and how they manage colors. Photoshop files can only have a single color space, so there’s no need for a Transparency Blend Space choice—the sRGB document’s Blending Mode has to be RGB. InDesign documents can have a mix of objects with different color modes—CMYK, RGB, or Lab—so when color gets flattened on export or output there needs to be a single output space 0dSWe3.