Custom color field in Acrobat

Have you looked at the "Properties" option for the text field and looked at the options on the 'Appearance' tab. All the option on that tab for 'Border', 'Fill', and 'Text' have a color option picker with some standard colors and below the group of standard colors is an "Other" option. Look at using the "Other" option, you can adjust the 'Hue', 'Saturation', 'Luminescence', 'Red', 'Green', and 'Blue' components of the custom color by entering in numeric values or using a slider on a color sheet.

Have you looked at the PDF Reference or the Acrobat JavaScript API Reference?

PDF's and PDF forms do not use the hex code values for color intensity, but uses a value from 0 to 1 for the intensity of the color component. The value or values will depend upon the color array that you will be using (Gray, RGB, or CMYK). You can use JavaScript within a PDF to dynamically modify the colors of a field.

Thanks for your response. I am under Text Field Properties -> Appearance -> Text -> Text Color -> Other Color. In the Other Color box, I have a few options, including a color wheel, gray scale slider (which appears to be a drop down menu but I am unable to select that), Apple Palette (again with an unselectable drop down), Image: Spectrum, and Crayon box. All of these have a magnifying glass and field to search, but I'm unable to select that box and enter in my custom colors.

I was able to use the magnifying glass, once I figured it out, to hover over a document I had open with the right colors, which captured my colors and I could save them as custom colors.