Sounds like you are directing your question to someone in particular but you don't specify. For a 'guarantee' safety go with 1/4" thick tempered glass, and the lawyer in me says i cannot and will not absolutely guarantee absolutely safety at absolutely at all absolutely all times.

Full curtains or shades depending on the decoration in the room.

well how to draw a swag and tail for 6'×6' french window

The Color of the glass depends upon the user : 01) Generally people prefer for clear glass to solve the purpose of opening. 02) Go for tinted shade films to match the facade , plays with transparencies, Solar reflective films etc. That again with the purpose of opening . General variant available are in shade of blue green. 03) Then comes the tinted colored glass , that have varieties and options in color . can go with several permutations and combinations of colors in one frame itself.