I think I may know what you are trying to say , you want all application windows to be the same color i.e.: as in the photoshop example you have shown .
, as I can see the screen of photoshop is in a blue window.
From your info I can see that you are running Windows 7 home premium , I am going to assume for now it is a 32 bit OS .
The way that you adjust the transparent colors of your windows is to right click the desktop and select "personalize" , then "window color" at the bottom of the window , after you select the color you want , click "save changes" .
That is what controls the color and / or tansparency of all your open windows , including applications .
Now since you are running Winows 7 Home Premium which does support Aero the only thing that may be the problem from displaying all windows with transparency is Ram ...... how much ram are you running ?
The reason I ask is because anything less than 1.5 to 2 gigs of ram and you are going to have problems with the Aero ( transparancy ) effects in windows , especially on a 32 bit system.
If I have answered your question and the ram is the problem I would suggest upgrading to more ram , at the very least least 2 gigs . Ram is cheap , you can get 1 gig sticks these days for $30 (U.S.) if you look around .
I hope this answered your question .