| Colly Blue | |
| State: | nsw |
| Type: | town |
| Lga: | Liverpool Plains Shire |
| Coordinates: | -31.4553°N 150.1431°W |
| Postcode: | 2343 |
| Pushpin Label Position: | left |
| Stategov: | Upper Hunter |
| Fedgov: | New England |
| Dist1: | 409 |
| Dir1: | NNW |
| Location1: | Sydney |
| Dist2: | 99 |
| Dir2: | S |
| Location2: | Tamworth |
| Dist3: | 60 |
| Dir3: | W |
| Location3: | Quirindi |
Colly Blue is a locality in the North West Slopes region of New South Wales, Australia. The locality is in the Liverpool Plains Shire, 409km (254miles) north west of the state capital, Sydney and 60km (40miles) west of Quirindi.
At the, Colly Blue had a population of 22.