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I calculated there to be 16,777,216 possible hex color code combinations.
The maximum possible characters that we can have in a single hexadecimal character is 16 and the maximum possible characters a hex color code can contain is 6, and this brought me to my conclusion of 16^6.
Is this correct? If not, please tell me how many possible color combinations there are and how it can be worked out.
635
In this case the answer is 24. You can start of with any one of the colors (4).
RGB color is best suited for on-screen applications, such as graphic design. Each color channel is expressed from 0 (least saturated) to 255 (most saturated). This means that 16,777,216 different colors can be represented in the RGB color space.
By using a hexadecimal, or 16-bit number system, the maximum number of colors that can be displayed at any one time is 16 x 16, or 256 colors. These 256 colors are represented as the values 0 – 255. In order to convert an RGB color code to a hex color code, you will need to convert each of the values individually.
Each two digit hex pair can have a value from 00 to FF (FF=256 in base 10). This gives over 16 million possible colors.
There are 16,777,216 colors using #RRGGBB notation.
Each color channel is described using 1 byte of information. Byte can contain 256 different values. So for 3 channels, it's:
256^3 = 16,777,216 = 16M
However, modern browsers support transparency - #AARRGGBB, by similar logic you get:
256^4 = 4,294,967,296 = 4G
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