Recently we had to create a PDF certificate for a client who needed a specific CMYK colour breakdown for the text input fields. Acrobat offered colour but not the ability to specify it yourself. You had to choose from their swatches. Now, this took a bit to find a workaround. We tried scripting but no luck. Fortunately the solution, on a Mac anyhow, is a whole lot easier than that. Open up TextEdit, bring up the colour palette, choose your colour with the CMYK sliders and drag the colour into the strip at the bottom to save the colour. Now go back to Acrobat and Bob’s your uncle! There’s your colour ready to go in the swatch palette.