The color black?
In the darkest of ancient India,
Referring to Indian Ink (thanks MMAdams)
I will take the light out of your day,
Darkness/black, absence of light
the number one Type'O you may say.
referring to Type O Negatives "Black No. 1"
From caves to comic books, you make my mark,
Caves are dark, and comic books use black ink
I am often associated with the dark.
Black is the color of darkness
Enjoy my benefits after a feast,
Black Friday, after Thanksgiving (MMAdams)
switch one word and you're a criminal to say the least.
Black Market - Where criminals go to buy things ;)
Adorn me when you're mourning,
Wearing black at funerals
Pirates may use me as a warning.
Pirates have a black flag on their ships and that warns people that they're pirates.
Anish Kapoor was banned from using the pinkest pink color since he got exclusive rights to the blackest black color