To paint with black and white colour is known as:

Question

Accepted Answer

To paint with black and white color is known as "Achromatic." Here is a detailed explanation supporting why Option 4 is the correct answer and why the other options are incorrect:

1. **Achromatic (Option 4):** The term "achromatic" is derived from the Greek words "a-" meaning "without" and "chroma" meaning "color." In the context of painting, achromatic refers to the use of colors that do not have hue, specifically black, white, and the various shades of gray in between. Since black and white are devoid of color in the traditional sense, painting with these colors is accurately described as achromatic. This is why Option 4 is the correct answer.

2. **Monochromatic (Option 1):** Monochromatic refers to a color scheme that is based on variations in lightness and saturation of a single color. While it involves the use of one color, it does not specifically refer to black and white. Instead, it could be any color, such as blue, red, or green, with its tints and shades. Therefore, monochromatic is not the correct term for painting with black and white.

3. **Bichromatic (Option 2):** Bichromatic means involving two colors. While black and white are indeed two colors, the term bichromatic does not specifically capture the essence of using colors without hue. Bichromatic could refer to any two colors, such as red and blue, or yellow and green. Thus, it does not accurately describe the use of black and white.

4. **Polychromatic (Option 3):** Polychromatic refers to the use of multiple colors. It is the opposite of monochromatic and involves a wide range of colors. Since black and white do not constitute a range of colors, polychromatic is not applicable in this context.

In conclusion, the term "achromatic" precisely describes the use of black and white in painting, as it refers to the absence of hue. This makes Option 4 the correct answer.