Step 1: Understanding the Concept:
In color theory, colors are often divided into two categories: warm and cool. Warm colors are associated with sunlight and fire, while cool colors are associated with water and sky.
Step 2: Detailed Explanation:
Warm Colors: These include Red, Orange, and Yellow, and variations of these colors. They tend to be vibrant and energetic.
Cool Colors: These include Blue, Green, and Purple (or Violet). They are often considered calming and soothing.
Based on this classification:
(A) Red, (C) Orange, and (D) Yellow are warm colors.
(B) Purple is a cool color, as it is made by mixing red (warm) and blue (cool).
Step 3: Final Answer:
Purple is not a warm color; it is classified as a cool color.