What color do grey and black make?
Grey and Black make dark grey.
Grey and Black make dark grey, #404040. That is the result in equal parts, mixing pigment rather than light - paint, ink and dye all behave this way.
Equal parts grey and black · #404040
Change the ratio
Very little of a mix is ever half and half. Shifting the balance moves the result along the range between the two colours.
3 parts grey, 1 part black · #606060
Equal parts · #404040
1 part grey, 3 parts black · #202020
Lighter and darker
With white added - a tint · #808080
With black added - a shade · #2b2b2b
Why it works
Adding black to grey makes a shade. Black absorbs across the whole spectrum, so the result keeps its hue but loses brightness and some saturation, which is how grey becomes dark grey.
Frequently asked questions
What color do grey and black make?
Grey and Black make dark grey, #404040. Mixed in equal parts that is the result you get with paint, ink or any other pigment.
How do I make the result lighter or darker?
Add white for a tint - here that gives grey. Add black for a shade, which gives dark grey. Add white a little at a time, because it takes far less than people expect to shift a mix.
What happens if I use more grey than black?
Three parts grey to one part black gives grey. Reversing it to one part grey and three parts black gives black instead.
Does this work the same way on a screen?
No. Screens mix light additively, so red and green light make yellow there. These results are subtractive - paint, ink, dye and pigment - which is what people mean when they ask what two colours make.