The inkjet coated types have a lot of OBA usually, see attached spectral plots image.
I often use an offset paper that is enhanced for digital print, Biotop 3+ etc, that has a natural color. At 80-120 grams still not opaque enough for a good dual sided print and the paper warps at high inkloads. Not printing that sharp either and the gamut suffers compared to normal inkjet papers.
Met vriendelijke groet, Ernsthttp://www.pigment-print.com/spectralplots/spectrumviz_1.htm
July 2013, 500+ inkjet media white spectral plots.