How many hexadecimal color codes are there?


There are 16,777,216 hexadecimal colors using #RRGGBB notation.

Colors in Computers

Colors in computer graphics are represented by combining three primary colors: red, green, and blue, in varying proportions. This color model is known as RGB (Red-Green-Blue). In the RGB color model, each color channel has a range from 0 to 255, where 0 represents the absence of that color and 255 signifies the maximum intensity of that color.

The RGB color model allows users to specify colors by indicating the values of the red, green, and blue channels. For example, the color pure red would be represented as (255, 0, 0), while pure green would be (0, 255, 0), and pure blue would be (0, 0, 255).

Another commonly used representation for colors in computers is the hexadecimal notation, also known as #RRGGBB. In this notation, each of the three color channels is represented by two hexadecimal digits, providing a more compact and user-friendly format for specifying colors. Hexadecimal digits range from 00 to FF, which are equivalent to decimal values from 0 to 255.

For example, pure red in hexadecimal notation would be #FF0000, pure green would be #00FF00, and pure blue would be #0000FF.

Both RGB and hexadecimal notations are widely used in computer graphics, web design, and programming, providing flexibility and convenience in specifying colors for various applications.

HexaDecimal Color Codes

In computer graphics, hexadecimal colors employ sixteen different values to represent shades of colors, encompassing red, green, or blue components. Each color is represented by a combination of numbers or characters, ranging from 0 to 9 and A to F. Here, 0 represents the minimum value, and F denotes the maximum.

The hexadecimal color format is structured as #RRGGBB, where RR corresponds to the red component, GG signifies the green component, and BB represents the blue component. Each of these elements consists of two symbols, expressing a color value within the range of 0 to 255.

For instance, the hexadecimal color #FF0000 denotes pure red, where the red component (RR) is at its maximum (FF), and green (GG) and blue (BB) are both set to the minimum (00). Similarly, #00FF00 represents pure green, while #0000FF stands for pure blue.

  1. Element 1: Red value
  2. Element 2: Green value
  3. Element 3: Blue value

Hexadecimal color codes provide a convenient and concise representation of colors in digital systems. The conversion from the RGB color model to hexadecimal is achieved by encoding each value (red, green, and blue) into a unique 2-digit alphanumeric code, where each digit can take on values from 0 to 9 and A to F.

For instance, given the RGB code (92, 153, 114), the corresponding hexadecimal code is 5C9972. In this case, 5C represents the red component, 99 represents the green component, and 72 represents the blue component.

Hexadecimal color codes allow for an extensive range of color combinations due to the use of 16 different values for each component. With each digit representing 16 possibilities (0 to 15), the total number of color combinations that can be represented using hexadecimal codes is vast. This wealth of color possibilities grants designers and developers the flexibility to create an extensive array of colors to suit their creative visions and digital projects.


In the hexadecimal color code, each color channel is represented by a two-digit alphanumeric value, resulting in a total of six digits for the entire code. Notably, one byte of information is allocated to describe each color channel. A byte can accommodate 256 distinct values, leading to a color range of 0 to 255 in the RGB color model. Consequently, there are precisely 256 potential values available for each of the Red, Green, and Blue color channels, providing a rich spectrum of color possibilities in digital graphics and design. So for 3 channels, it is:

256^3 = 16,777,216 = 16M

So you have hex 00 00 00 to FF FF FF or using web terminology;

#000000 to #FFFFFF

However, modern browsers support transparency - #AARRGGBB.

By similar logic you get:

256^4 = 4,294,967,296 = 4G

Here are some examples of hex color codes and their decimal RGB equivalents:

#FFFFFF - (255, 255, 255) White Color #000000 - (0, 0, 0) Black Color #FF0000 - (255, 0, 0) Red Color #000080 - (0, 0, 128) Dark Blue Color

JavaScript Hex Color Codes

What are hex Color codes

Here is a simple node program that return an array of all the possible hex code in JavaScript.

function getHexColorCodes(){ var hexCode = [0,1,2,3,4,5,6,7,8,9,'A','B','C','D','E' ,'F']; var arr = []; for (var i = 0; i < hexCode.length; i++) { console.log(`Loop it ${i+1} times`); for (var y = 0; y < hexCode.length; y++) { for (var x = 0; x < hexCode.length; x++) { for (var a = 0; a < hexCode.length; a++) { for (var b = 0; b < hexCode.length; b++) { for (var c = 0; c < hexCode.length; c++) { arr.push(`#${hexCode[i]}${hexCode[y]}${hexCode[x]}${hexCode[a]}${hexCode[b]}${hexCode[c]}\n`); } } } } } } return arr; } var hexColors = getHexColorCodes(); console.log("Total hex colors : " + hexColors.length);
Loop it 1 times Loop it 2 times Loop it 3 times Loop it 4 times Loop it 5 times Loop it 6 times Loop it 7 times Loop it 8 times Loop it 9 times Loop it 10 times Loop it 11 times Loop it 12 times Loop it 13 times Loop it 14 times Loop it 15 times Loop it 16 times Total hex colors : 16777216

Hexadecimal color values are widely supported in all modern web browsers, making them a standard and versatile choice for specifying colors in web development and CSS (Cascading Style Sheets). Moreover, CSS offers a convenient shorthand notation for hexadecimal colors, allowing developers to write shorter codes for colors with repeating digits in each channel.


Implementing shorthand hexadecimal notations, web developers can enhance the readability and efficiency of their CSS code, making it easier to manage and maintain the visual elements of web pages. This concise representation of colors, coupled with broad browser support, contributes to a smoother and more consistent user experience across different devices and platforms.