Will selling provinces to a old world nation trigger the formation of a colonial state?

[treb]

I'm currently doing an achievement run as New Providence, the entire caribbean is colonial nations except for 3 islands held by Spain. If I sell them two islands will a colonial nation form to make taking them easier?

 

[BoomKidneyShot]

I'm currently doing an achievement run as New Providence, the entire caribbean is colonial nations except for 3 islands held by Spain. If I sell them two islands will a colonial nation form to make taking them easier?

Yes, having 5 cores in the same region will form a colonial nation.