Hue, Value, And Chroma: The Three Dimensions Of Color

Hue, Value, And Chroma: The Three Dimensions Of Color

Write short notes on Hue, Value, and Chroma.
Or
Write long answers on Hue, Value, and Chroma.
Answer:

To accurately describe a beam of light reflected from the surface of a tooth or restoration, three variables should be measured, i.e. Hue, Value, and Chroma.

Hue:

• Hue describes the dominant color of an object, e.g. red, green, yellow, or blue.
• It represents the dominant wavelength present in the spectral distribution. Red, green, and blue are the primary hues, while yellow, cyan, and magenta form the secondary hues.
• The primary hues are the colors that cannot be made by mixing other colors; hence, they are called primary colors. Secondary colors can be made by mixing two primary colors, e.g. mixing red and blue gives violet.

Value:

• Objects of the same color can be separated into lighter or darker shades.
•  Value can be defined as the lightness or darkness of a color.
• Value also referred to as the grayscale value can be measured independently of the hue.
• It is independent of the color.
• White color appears less white as the light intensity decreases. Hence it is said that the value of color decreases as it becomes darker.

Chroma:

• The degree of saturation of the hue is known as chroma.
• Chroma is a measurement of color intensity. For example, the yellow color of a lemon is less saturated than that of a sunflower.