Most of us here are aware as I think that pure water has a natural quest to absorb visible red colour wavelength slightly due do which liquid water and sometimes even ice appears to have a blue colour tinge.
But even gaseous water(water vapour or steam) also absorbs red, rather it absorbs more strongly the red then liquid and solid water due to absence of hydrogen bonding.
So why don't clouds/ masses of suspended water vapour appear blue. Why do clouds simply scatter/reflect the white light that falls upon them instead of simultaneously absorbing the red from white llight along with scattering of white light and finally appearing blue just like water.
The proof of gaseous water absorbs red more strongly then liquid and solid water - http://www.webexhibits.org/causesofcolor/5B.html In this link look up in "What is the role of hydrogen bonding" section.