OS Windos 7 x64 CPU i5 3570K Motherboard Intel DH77DF Memory 2 x 8GB G.Skill Graphics Card HD4000 Sound Card on board Monitor(s) Displays LG IPS236 x 2 Screen Resolution 1920 x 1200
Keyboard Dell Mouse Microsoft Basic Optical Mouse PSU BeQuiet 480 E9 CM Modular Case Lian Li PC-Q25 Silver Cooling Titan Hard Drives Samsung 840 Pro 256GB Internet Speed 6 MB Other Info Don't talk if you can't improve the silence.
For changing the color on various things like the text in the message box or even reply window here once a new theme changes the default color layout seen with Windows you can manually tweak those through the Personalize>Windows Color>Advanced section when right clicking on a blank area of the desktop.
THe image there looks like the background like your desktop around the edges of the IE window. For seeing that in addition to the wallpaper with the transparency the "Application background" is the item to select. When opening a full screen program like a pc game you will see the change noticed right away.
When first applying a few new themes the only thing visible in any Windows Explorer window was the folder icons not even the names of the folders could be seen. The Advanced section is where to go for color control there.
OS Windows 7 Ultimate x64, XP Mode, W8 RP VM, Linux Mint Debian 2nd OS HD- 7 Pro x64 second case CPU AMD Phenom II X4 975 Deneb 3.6ghz - 965 on new mini tower Motherboard Gigabyte GA-790XTA-UD4 Memory Kingston Hyper X DDR3 1600 1.5v 16gb - Mushkin on 2nd build Graphics Card MSI HD Radeon 5750 1gb - MSI HD Radeon 6450 on mini tower Sound Card Creative Labs X-Fi XtremeGamer - Realtek onooard 2nd case Monitor(s) Displays 2 x Acer P191W 19" widesscreen - HP 20" widescreen mini towe Screen Resolution 1440x900 native - 1600x1024 on 7 Pro x64 build
Keyboard Microsoft Recusa Razor - MS Comfort 3000 on second build Mouse MS Trackball Explorer - A4TECH dual scroll wheel trackball PSU Corsair 750TX - primary / Corsair CX600 - second Case Antec 900-2 - SSD compatible / NZXT Vulcan mini tower Cooling Zalman CNPS9900A Hard Drives Primary Ultimate x64 build-
WD Black Edition 1tb Sata 6.0 = 2
WD Black Edition 1tb Sata 3.0 = 2 (OS drives)
WD 1tb Green Power sata = 2 1 external
usb flash drives = 18
Second 7 Pro x64 mini tower-
WD Caviar SE 500gb sata II single drive presen Internet Speed 30mbps upgrade - primary hard wired - mini tower usb WiFi
OS Windos 7 x64 CPU i5 3570K Motherboard Intel DH77DF Memory 2 x 8GB G.Skill Graphics Card HD4000 Sound Card on board Monitor(s) Displays LG IPS236 x 2 Screen Resolution 1920 x 1200
Keyboard Dell Mouse Microsoft Basic Optical Mouse PSU BeQuiet 480 E9 CM Modular Case Lian Li PC-Q25 Silver Cooling Titan Hard Drives Samsung 840 Pro 256GB Internet Speed 6 MB Other Info Don't talk if you can't improve the silence.
That was more of an example of how that would effect applications when they first load. The images you posted look like the corner of the IE window against a blue desktop in the background there. You can see that in the image here as well.
A larger view would show if that was the desktop or a shadow around the IE window itself there. Then you would need to look at things like shadows under menus and the like the Advanced performance settings. Note how one theme makes things unreadable with a black background I still haven't been able to change here.
OS Windows 7 Ultimate x64, XP Mode, W8 RP VM, Linux Mint Debian 2nd OS HD- 7 Pro x64 second case CPU AMD Phenom II X4 975 Deneb 3.6ghz - 965 on new mini tower Motherboard Gigabyte GA-790XTA-UD4 Memory Kingston Hyper X DDR3 1600 1.5v 16gb - Mushkin on 2nd build Graphics Card MSI HD Radeon 5750 1gb - MSI HD Radeon 6450 on mini tower Sound Card Creative Labs X-Fi XtremeGamer - Realtek onooard 2nd case Monitor(s) Displays 2 x Acer P191W 19" widesscreen - HP 20" widescreen mini towe Screen Resolution 1440x900 native - 1600x1024 on 7 Pro x64 build
Keyboard Microsoft Recusa Razor - MS Comfort 3000 on second build Mouse MS Trackball Explorer - A4TECH dual scroll wheel trackball PSU Corsair 750TX - primary / Corsair CX600 - second Case Antec 900-2 - SSD compatible / NZXT Vulcan mini tower Cooling Zalman CNPS9900A Hard Drives Primary Ultimate x64 build-
WD Black Edition 1tb Sata 6.0 = 2
WD Black Edition 1tb Sata 3.0 = 2 (OS drives)
WD 1tb Green Power sata = 2 1 external
usb flash drives = 18
Second 7 Pro x64 mini tower-
WD Caviar SE 500gb sata II single drive presen Internet Speed 30mbps upgrade - primary hard wired - mini tower usb WiFi