Full Idea
For resemblance nominalism the sentence 'the rose is crimson' commits us to at least one other entity that the rose resembles in order for it to be crimson.
Gist of Idea
Resemblance nominalism requires a second entity to explain 'the rose is crimson'
Source
Douglas Edwards (Properties [2014], 5.5.2)
Book Reference
Edwards,Douglas: 'Properties' [Polity 2014], p.108
A Reaction
If the theory really needs this, then it has just sunk without trace. It can't suddenly cease to be crimson when the last resembling entity disappears.