What term describes the brightness level within a digital image element?

• A. Hue
• B. Shades of gray
• C. Saturation
• D. Color temperature

Answer: (B)

Brightness in a digital image element is about how light or dark a pixel appears. In grayscale, this is shown as varying shades of gray from black to white, which is exactly what “shades of gray” conveys. The other terms describe color characteristics—hue is the color itself, saturation is how vivid the color is, and color temperature relates to the warmth or coolness of the light. So shades of gray best captures the idea of brightness levels because it directly expresses lightness independent of color.