The initial color of the gradient (solid fill color)

Set the left or top, or solid color when drawing the gradient, depending on the set type of gradient.

Set the color:

Registry Hive	HKEY_LOCAL_MACHINE
Registry Path	Software\BaseALT\Policies\gsettings
Value Name	org.mate.background.primary-color
Value Type	REG_SZ
Default Value

lock

Registry Hive	HKEY_LOCAL_MACHINE
Registry Path	Software\BaseALT\Policies\GSettingsLocks
Value Name	org.mate.background.primary-color
Value Type	REG_DWORD
Default Value	0
True Value	1
False Value	0

Lock changes to this setting. User policies for this setting will be ignored.