Some places, water looks like diarrhea

Yes. Gold nanoparticles are purple. It's not what they 'really' are (atoms are not shiny hard spheres). it's the absorption spectra that causes our perception of colour.

That is a completely ignorant statement.  The color (or other properties) of a molecule (which is what water is) are not going to be the same as with the colors (or other properties) of any individual atoms that make it up.  Carbon is typically a black solid (except as diamonds), hydrogen, nitrogen and oxygen are colorless gases, yet as C₁₆H₁₀N₂O₂, they form indigo dye that makes blue jeans the color they are.  NO₂ formed from two colorless gases is reddish-brown, not colorless.  Sodium is a silver metal, Chlorine is a greenish gas, but Sodium Chloride (Salt) is white.  Lead is dull gray, oxygen is colorless, but Pb₃O₄ is bright red-orange.

clear

Okay, the statement i made about to transparent particles forming only transparent substances is of course, false.

Still i hold my ground on pure H20.

Scientific fact: When light of the same emission spectrum of the Sun strikes pure water, the light that is reflected is of a wavelength that is percieved by our brain as blue.

Isnt it like air? it contains very very small amounts of blue particles which reflect only blue light (depending on the colour of the water), this means that in small amounts the coloured content is far too small to be visable, but when in large amounts there is a sufficient amount of particles for us to see :D

colourless and odorless.... well.. not in Venecia...

When it enters the water, the light is separated, but the rays come back together to form light

It's been said before, but the answer is blue. And yes, also on the molecule scale it's blue.