Index - O
| onblack | Ermine.Pretty |
| onblue | Ermine.Pretty |
| oncyan | Ermine.Pretty |
| ondullblack | Ermine.Pretty |
| ondullblue | Ermine.Pretty |
| ondullcyan | Ermine.Pretty |
| ondullgreen | Ermine.Pretty |
| ondullmagenta | Ermine.Pretty |
| ondullred | Ermine.Pretty |
| ondullwhite | Ermine.Pretty |
| ondullyellow | Ermine.Pretty |
| ongreen | Ermine.Pretty |
| onmagenta | Ermine.Pretty |
| onred | Ermine.Pretty |
| onwhite | Ermine.Pretty |
| onyellow | Ermine.Pretty |
| op | Ermine.Parser.Style |
| operator | Ermine.Parser.Style |
| optimize | Ermine.Core.Optimizer |
| Options | |
| 1 (Type/Class) | Ermine.Console.Options |
| 2 (Data Constructor) | Ermine.Console.Options |
| options | Ermine.Console.Options |
| optionsMonitorOptions | Ermine.Console.Options |
| otherKeywords | Ermine.Parser.Keywords |