/usr/lib/GNUstep/ColorPickers/ is in gnustep-gui-runtime 0.22.0-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/GNUstep/ColorPickers/NamedPicker.bundle/
/usr/lib/GNUstep/ColorPickers/NamedPicker.bundle/NamedPicker
/usr/lib/GNUstep/ColorPickers/NamedPicker.bundle/Resources/
/usr/lib/GNUstep/ColorPickers/NamedPicker.bundle/Resources/GSNamedColorPicker.tiff
/usr/lib/GNUstep/ColorPickers/NamedPicker.bundle/Resources/Info-gnustep.plist
/usr/lib/GNUstep/ColorPickers/NamedPicker.bundle/stamp.make
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/English.lproj/
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/English.lproj/StandardPicker.strings
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/French.lproj/
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/French.lproj/StandardPicker.strings
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/GSCMYKColorPicker.tiff
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/GSGrayColorPicker.tiff
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/GSHSBColorPicker.tiff
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/GSRGBColorPicker.tiff
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/Info-gnustep.plist
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/Spanish.lproj/
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/Spanish.lproj/StandardPicker.strings
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/Swedish.lproj/
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/Resources/Swedish.lproj/StandardPicker.strings
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/StandardPicker
/usr/lib/GNUstep/ColorPickers/StandardPicker.bundle/stamp.make
/usr/lib/GNUstep/ColorPickers/WheelPicker.bundle/
/usr/lib/GNUstep/ColorPickers/WheelPicker.bundle/Resources/
/usr/lib/GNUstep/ColorPickers/WheelPicker.bundle/Resources/GSWheelColorPicker.tiff
/usr/lib/GNUstep/ColorPickers/WheelPicker.bundle/Resources/Info-gnustep.plist
/usr/lib/GNUstep/ColorPickers/WheelPicker.bundle/WheelPicker
/usr/lib/GNUstep/ColorPickers/WheelPicker.bundle/stamp.make