Keep the negative energy distant with blue curtains

Blue colour is epitome of positivity that it instills within us and works as anti-reflective towards the negative energies. That is why Vastu recommends installing blue colour blinds or curtains in order to keep the surroundings neutral and healthy. It is advised to have maximum windows in East & North while minimal in South & West because Southern sunlight is harmful and late afternoon sunrays in the form of infrared rays pollutes the environment with negativity.
There are several harmful affects of infrared red rays on health & environment for which blue colour curtains are advisable, read out to know how blue colour counteract negativity: http://www.vaastu-shastra.com/ward-off-negative-energy.html