Web-safe color image maker

This tool converts images to web-safe colors. It takes any image as the input and returns a new image that's re-colored using a web-safe color palette. The web-safe colors consist of 216 shades that are universally supported by all web browsers and older computers. An image that uses only web-safe colors is consistently displayed across different devices (older and newer) and browsers without dithering. In addition to web-safe colors, the program can also utilize other well-known color palettes. Among these are the Basic HTML Colors, which include 16 colors formed by varying percentages of red, green, and blue light. Next is the Extended HTML Colors, offering a wider range of 140 distinct colors with recognizable names, such as DeepPink, Firebrick, Tomato, Gold, Sienna, Purple, Navy, Turquoise, Olive, Beige, Silver, and others. The CSS Colors palette consists of 141 colors and is nearly identical to Extended HTML Colors, with the only difference being the inclusion of the color RebeccaPurple (which has the RGB code RGB(102, 51, 153)). The RebeccaPurple color is only present in the CSS palette. The Safest Web Colors palette is a limited set of 22 shades carefully selected from the 216 web-safe colors, ensuring reliable display on 16-bit computer monitors. Finally, there are eight more image palettes consisting of various shades of gray. Each of these palettes has a specific number of tones. The 256-shade grayscale palette is the most versatile and includes all possible gray tones, followed by progressively sparser palettes with 128, 64, 32, 16, 8, 4, and 2 gray colors. To convert an image into one of these color palettes, the program offers two color reduction algorithms. The "Closest Color Distance" algorithm is the faster of the two and uses the Euclidean distance method to determine the closest color in the chosen palette for each pixel in the image. It calculates the difference between the RGB values of the original pixel and the available palette colors, selecting the color with the smallest metric distance. The "Closest Perceived Color" algorithm, on the other hand, is slower but more accurate. It utilizes the delta-E (ΔE) distance method, accounting for differences in color perception of the human eye. This method ensures that the converted image closely matches the original in terms of how colors are perceived. You can observe the difference in the output image produced by these two algorithms by switching between them in the options. Additionally, the resulting web-safe image can be downloaded in PNG, JPEG, or WebP formats. Image-abulous!