But..
You don't have to scatter blue light 'specifically'. Scattering is not like a dye or a pigment that has a particular characteristic wavelength or set of wavelengths. Rayleigh scattering affects all wavelengths, it just affects the shorter end of the spectrum (blue) more than the longer end (red). All you need is random particles smaller than about 450nm and nature will do the rest.
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notoolsovernight you're all luvvly an' 'orrible, Wed 18 Feb 2015, 15:39,
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