Colour loss when exporting as a PDF on iPad

Hi, I have an older laptop that doens't support the desktop version of illustrator, so I have to use the iPad version, I've worked for the past few weeks on a project that's now due tomorrow only to find that when I save it as a PDF as I need to, the colours all dull. I've tried googling it and all the fixes seem to be for the desktop version of the program, is there any way to fix this issue on the iPad?