| muddy(adjective, dull, soft, obscure, flat) |
| neutral(adjective, dull, lead, flat, grim) |
| plain(adjective, calm, dull, simple, soft) |
| blue(adjective, dull, unhappy, dark, black) |
| desolate(adjective, dull, blue, sad, unhappy) |
| lacklustre |
| sad(adjective, depressing, dull, unhappy, dark) |
| tan(noun, adjective, dark, color, bay) |
| trollop(noun, libertine) |
| beige(noun, adjective, dull, dark, color) |
| brownish(noun, adjective, colour, color, khaki) |
| dead(adjective, dull, hard, weak, simple) |
| faded(adjective, dull, hard, soft, obscure) |
| harlot(noun, libertine) |
| indistinct(adjective, dull, soft, obscure, flat) |
| jade(noun, libertine) |
| khaki(noun, adjective, dark, color, bay) |
| mousy(adjective, dull, soft, obscure, lead) |
| strumpet(noun, libertine) |
| tawny(noun, adjective, dark, color, bay) |