Depending how vivid your scarlet is: You can go with white or cream so it really is the accent wall and nothing is shouting for equal attention You can also go for a muted grey or beige

My drawing room front Window is going to be of around four feet wide. As the width of this room front wall is 10 feet out of which 3'6" will be kept for front entrance door. I am confused whether the sill height of the window should be 6 inches or 3 feet high as sofa is coming in front of it as my drawing room size is 10'0" * 14'0".

The comfort height toilets are typically between 17" and 19" to the top of the seat. The link below is a provides a nice overview of options to consider when purchasing a toilet. http://m.us.kohler.com/mt/www.us.kohler.com//us/How-to-Shop-for-Toilets/content/CNT800391.htm

i m starting my home at north west india so what will be sufficent height of lenter after that i will also use down ceiling design