Nail extensions?

[TigerTips]

Hi there,
what are the nail extensions that are for example black but underneath its a different colour? What are they called?
Thanks x

 

[beauty_sarah]

Louis Vuitton nails x

 

[Dol]

Laboutin?

 

[Emily Case]

Louboutin nails

Xxx

 

[Emily Case]

 

[Precious2013]

Ohh how are these done?

 

[TigerTips]

Thank you Ladies xx