What effect occurs when black is added to orange?

Correct answer: A darker shade of orange will be formed

When black is mixed with orange, it lowers the lightness of the original colour and forms a darker orange shade. The colour family remains orange, although the result may look muted or deeper depending on the pigment and quantity of black. Black alone cannot transform orange into blue, white, or green. Since a shade is a darker form of a colour, option A correctly states the effect.