All the entries in the top row of the bitmap are 3. The color table tells us that 1 represents the color red, so the pixel is red. The corresponding number in the bitmap is 1. Look at the pixel in row 3, column 5 of the image.

The numbers are shown in hexadecimal (base 16) form: A = 10, B = 11, C = 12, D = 13, E = 14, F = 15. Each color in the table is represented by a 24-bit number: 8 bits for red, 8 bits for green, and 8 bits for blue. Each pixel is represented by a 4-bit number, so there are 2^4 = 16 colors in the color table. The following illustration shows an enlarged image along with its bitmap and color table. A color table maps numbers in the bitmap to specific colors. Such a file might also contain a color table (sometimes called a color palette). Number of colors that can be assigned to a pixelДisk files that store bitmaps usually contain one or more information blocks that store information such as number of bits per pixel, number of pixels in each row, and number of rows in the array. The following table shows a few examples of the number of colors that can be assigned to a pixel represented by a given number of bits. For example, if each pixel is represented by 4 bits, then a given pixel can be assigned one of 16 different colors (2^4 = 16). The number of bits devoted to an individual pixel determines the number of colors that can be assigned to that pixel.

A bitmap is an array of bits that specifies the color of each pixel in a rectangular array of pixels.

Adobe illustrator 8 16 32 colors