Question about drill bits

[Shonver]

This is not about drill bit application, but looks/finish:

What do you call the drill bits that are silver/chrome in colour (not referring to masonry bits; these are shaped like the ordinary HSS ones)? What are they?

Ditto for the gold-coloured ones...

 

[Terrano]

 

[Crankshaft]

 

[chrisc]

 

[mafioso]

 

[Skylark]

 

[chrisc]

 

[Shonver]

 

[mafioso]

 

[Shonver]

 

[Timber_MG]

 

[Moron]