I'm using the default Ubuntu Human theme. ls /usr/share/themes gives:
AgingGorilla HighContrast Metabox Atlanta HighContrastInverse metacity-1 Bright HighContrastLargePrint Mist Clearlooks HighContrastLargePrintInverse Outdoors ClearlooksAlternative Human Qt Crux Industrial Raleigh Default IndustrialTango Redmond Emacs LargePrint Resilience Esco LegacyHuman Silicon Glider LowContrast Simple Gray LowContrastLargePrint ThinIce
I'm using the default Ubuntu Human theme.
ls /usr/share/themes gives:
AgingGorilla HighContrast Metabox gePrint Mist gePrintInverse Outdoors native Human Qt ePrint ThinIce
Atlanta HighContrastInverse metacity-1
Bright HighContrastLar
Clearlooks HighContrastLar
ClearlooksAlter
Crux Industrial Raleigh
Default IndustrialTango Redmond
Emacs LargePrint Resilience
Esco LegacyHuman Silicon
Glider LowContrast Simple
Gray LowContrastLarg