Question

Hue is the value of the equivalent pure (saturated) colour in any given colour. It is represented as a colour wheel going through the colour spectrum, from primary colours Red through Green, Blue and back to Red. If the hue values in degrees range from 0 to 360, what is the hue value of the colour Yellow?

• A. 30
• B. 60
• C. 90
• D. 120

Hint:

Remember the order of colors on the additive color wheel: Red, Yellow, Green, Cyan, Blue, Magenta. With Red at 0°, each of these six key colors is separated by 60°.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
The question is about the HSL/HSV color model, specifically the 'Hue' component. Hue is represented as an angle on a color wheel, from 0 to 360 degrees. The primary colors of this model (the additive primaries) are Red, Green, and Blue.
Step 2: Key Formula or Approach:
The standard convention for the hue color wheel places the primary and secondary colors at specific angles. Red is typically at 0°. The other colors are spaced out around the 360° circle. The secondary colors (Yellow, Cyan, Magenta) are located halfway between the primary colors that form them.
Step 3: Detailed Explanation:
The color wheel is arranged as follows:
- Red (R): Primary color, conventionally set at 0°.
- Green (G): Primary color.
- Blue (B): Primary color.
The secondary colors are created by mixing two primaries:
- Red + Green = Yellow (Y)
- Green + Blue = Cyan (C)
- Blue + Red = Magenta (M)
The order on the wheel is R → Y → G → C → B → M → R.
The three primary colors (R, G, B) are separated by 120° each.
- Red is at 0°.
- Green is at 120°.
- Blue is at 240°.
Yellow is the secondary color located exactly halfway between Red and Green.
\[ \text{Hue of Yellow} = \frac{\text{Hue of Red} + \text{Hue of Green}}{2} = \frac{0^\circ + 120^\circ}{2} = 60^\circ \] So, the hue value for pure yellow is 60 degrees.
The full wheel is: - Red: 0° - Yellow: 60° - Green: 120° - Cyan: 180° - Blue: 240° - Magenta: 300°
Step 4: Final Answer:
The hue value of the colour Yellow is 60 degrees.