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If the paper white value is larger than 1.5 dE00, you might want to try a different spectrophotometer measurement condition. (see below). If the measurement condition is correct, and paper white L* is slightly high (less than 1), and b* is slightly bluer (up to 2 units lower) than the target paper white; this can be corrected with a little bit of yellow paper tint. Yellow dots will lower the L* value of the paper slightly and are not visible to the eye. It is not recommended to tint the paper with any other color ink.
If the color gamut is not large enough, you might want try a higher Total Ink Limit value. (see below).
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