Full Idea
Since properties themselves can have properties there is a well-known division in the theory of properties between those who take a typed and those who take a type-free approach.
Clarification
A 'typed' approach is hierarchical
Gist of Idea
Since properties have properties, there can be a typed or a type-free theory of them
Source
Thomas Hofweber (Inexpressible Properties and Propositions [2006], 2.2)
Book Reference
'Oxford Studies in Metaphysics vol.2', ed/tr. Zimmerman,Dean W. [OUP 2006], p.169
A Reaction
A typed approach would imply restrictions on what it can be a property of. 'Green' is a property of surfaces, 'dark' is a property of colours. My first reaction is to opt for type-free.