The 24-color wheel is a color model that includes 24 colors. These colors are arranged in a circle, similar to the traditional 12-color wheel. The names of these colors can vary depending on the specific system or source. Commonly used color names in the 24-color wheel include primary colors (red, blue, yellow), secondary colors (green, orange, purple), and intermediate colors (e.g., red-violet, blue-green, yellow-orange).