I have an Indesign document that utilizes gray lines that I created within Indesign. These lines are simple, and separate a title on a page from the rest of the content (I am creating a cookbook). When I convert my document to a PDF, however, some of these gray lines change to black while others remain gray. I have tried copying one of the lines that have stayed gray and applying them to all other pages, which did not work. I have tried looking online and numerous different output options, none of which have fixed my issue. I have also tried creating black lines and making them grayscale as well as using rbg gray for the outline color- still doesn't work. Is there something that I'm missing? I can't find any answer for this issue, and this is an extremely important project. Thanks in advance for anyone able to give me any insight.
Does this happen also when you zoom in in Acrobat?
If not, then it is only a screen issue. You can ignore it.
If you make your design for screen, you should avoid this type of lines, as it will always happen.