How many colors can an image with 24-bit true color display?

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computer graphics The Utah Teapot, a standard graphics image used to benchmark computer systems.

An image using 24-bit true color can display $2^{24}$ distinct colors, which totals 16,777,216 colors.

In this system, each pixel is represented by 24 bits of data, typically divided into three 8-bit channels for the primary colors of the RGB color model: red, green, and blue. Each 8-bit channel allows for $2^{8}$ (or 256) possible intensity levels for that specific color. By combining these, the system produces $256 \times 256 \times 256 = 16, 777, 216$ possible color combinations.1