When the color of a pdf looks different on an iOS device than it does on your computer, it can be fixed!
The issue is not actually a Showpad issue but an iPad issue. You can check this by opening the file from mail or cloud using iBooks. The color will also be changed.
What can you do to make the color look normal?
You will need to re-save the PDF as RGB. To do so, please follow the following steps:
Open PDF in Preview
Click on File → (Hold ALT) → Save As
Click on Quartz Filter and choose: “Create Generic PDFX-3 document”
These directions are for a Mac computer. If you are working on a Windows computer, you’ll need a similar application such as Adobe Acrobat.