Changing Desktop Solid Color Via Registry

Solution 1:

HKCU\Control Panel\Colors\Background

It's a string with a space between the numbers for red/green/blue, for instance for straight blue: "0 0 255"

Solution 2:

the command line "reg add" works well. You can also import this registry:

Windows Registry Editor Version 5.00

; remove picture wallpaper
[HKEY_CURRENT_USER\Control Panel\Desktop]
"WallPaper"=""

; set RGB = black
[HKEY_CURRENT_USER\Control Panel\Colors]
"Background"="0 0 0"

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Solution 3:

The changes on the registry are not applied immediately.

A better alternative would be to use the windows function SetSysColors in C++.

See this answer: https://stackoverflow.com/a/19849675/3844137

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Solution 4:

You can change the desktop background for a user in the registry.

First remove the wallpaper, if there is one:

reg add "HKEY_CURRENT_USER\Control Panel\Desktop" /v WallPaper /t REG_SZ /d " " /f

Then set you color. The values are in RGB so for example "255 0 0" would be red.

reg add "HKEY_CURRENT_USER\Control Panel\Colors" /v Background /t REG_SZ /d "0 66 117" /f