Poor contrast viewing PDFs on iPhone

I just bought some colour guide books in PDF to take travelling on my iPhone.
Unfortunately the files use a cyan-coloured font which is a bit hard to read on a laptop, but is almost impossible to read on the iPhone (using iBooks as the PDF viewer), especially when on a light cyan or grey background.
Any suggestions how I could improve the contrast in viewing the PDFs on my iPhone 4?

pin2expo wrote:
PDF format is not supported till now. As soon as Apple will have 2.0 softwasre update PDF will be supported. Till then you may download other applications (3rd party) to open PDF. which is not advisable.
No You can view PDF's currently on the iPhone. Its by email attachment only, but its possible

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Malcolm Rayfield wrote:
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Poor contrast viewing PDFs on iPhone

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