Convert HEX to closest X11 Color Number

Question

I\'m looking for a Algorithm/Way to convert given HEX (e.g. #111111 R:0x11, G:0x11, B:0x11) to the closest X11 color number (Terminal is either 88 or 256 colors) using either Py

Answer 1

Once you know the RGB values of the X11 colors, you can determine to which of those colors a given input color is "nearest".

There is a good, quick measure of color distance here

https://stackoverflow.com/a/74033/141172