In Feng Shui blue color represents the element of water and corresponds to the North.
These colors are good for decorating Bagua areas of family and knowledge.
It is also the color of independence and thirst for adventures.
This color is believed to cool and calm down the body and mind.
For that reason light blue is not best color for decorating homes in cold climates.
The only rooms where blue color might appropriate is a bathroom and a rest room.
In these premises the coldness of blue helps people to free the body form energy litter.
Light blue is a very favorable color for children over 7.
It helps them to discover and develop their natural talents and abilities.
A good Feng Shui practice is to combine blue with green and white.
This combination of colors can be used for different purposes.
In a childrens room this color combination will be calming down overactive kids.
Since these colors represent Feng Shui water element, they are appropriate for decorating rooms related to water.
However, its better to avoid any excess of blue color in cold climates.