dark, deep, golden
light
healthy
all-over (esp. BrE), perfect (esp. AmE)
fake, spray-on
natural

have
show off, sport
Show off your tan in this little white top.

get, top up (BrE), work on
I want to top up my tan on the sunbed.

against your tan
His teeth were a gleaming flash of white against his tan.

Tan is used with these nouns as the object:
hide, leather, skin

Tan is used with these nouns:
complexion, skin