Here is patch to fix this.
unity-greeter will lookup /etc/lightdm/greeter-bottom-color.conf if it contains a valid color string(e.g. #123456).
If it does, this color will be used instead of the standard one(#2C001E)
Unfortunately, with the new unity-greeter version, the standard ubuntu background will be loaded and will fade into your custom image...
Here is patch to fix this. greeter- bottom- color.conf if it contains a valid color string(e.g. #123456).
unity-greeter will lookup /etc/lightdm/
If it does, this color will be used instead of the standard one(#2C001E)
Unfortunately, with the new unity-greeter version, the standard ubuntu background will be loaded and will fade into your custom image...