custom fog area and color

hello, my idea is for custom fog areas

the way it would work is you would have a command where you can make an area have fog.

like the fill command but to set an area where the fog should be. It would all so have a setting for the color code for the fog like leather armor, thickness setting  

         x    y     z  2x 2y 2z  thikness 1-0    mc color code

/fog 100 10 100 0   0   0         1                  16777215

as an example:

please if you need any more info ask :D

thank you for reading my suggestion
we can simulate this with glass but it can cause bad fps problems and does not look as nice