https://github.com/drtshock/Essentials/blob/2.x/Essentials/src/com/earth2me/essentials/ItemDb.java#L331

Should be comma-separated R,G,B values instead of just an int. Alternatively, the config reader/deserialisation should support this type of colour integer (in addition to the existing format).

https://korobi.io/network/esper/channel/drtshock/logs/2015/10/08/#L223

Any unit tests?

None, functionality has been tested by me successfully.

Fixed in bae6f89 and 9805f3f.