Indigo it is a plant used to make ink founded early 1500s
Black
Bluish black! INK
Bookkeepers used ink to record the money of a company. They use red ink for negative numbers and black ink for positive numbers. When a company is in the black it is making a profit.
because it absorbs every colour of the spectrum
Black gray yellow
Blue and black mainly.
black and red and pie
Most octopus secreted blackish ink that is mostly made up of black pigment melanin.
Black ink was used to draw draw pictures. You would dip a quill (a sharpened feather) into ink and draw picture because there wasn't markers black then. They also used black ink to write . you dip the quill into the ink and you start writing .
The Guru Granth Sahib is written with Black ink.
The company is making a profit. It comes from the colors of ink used when bookkeeping.
Pen colour is the colour of the ink ejected from the pen when it is used for its intended purpose (writing, or drawing). It is not necessarily the colour of the pen itself, either the casing (the outside) or the appearance of the ink cartridge inside.