I followed these instructions now: Colore is now Unity compatible!
Instructions for Unity:
Download the AnyCPU version to allow users on a 64-bit machine to use it, even if your game was built in 32-bit.
Extract the files into the Assets/plugins folder within your Unity project.
Set the API compatibility level of the player to .NET 2.0.
By default, it is set to a subset that can’t load in the Colore Library. Head over to Edit >> Project Settings >> Player and under “Other Settings” there is a section called Optimization. You will be able to adjust the API Level below that.