rgb2name returns the name of a color

## Syntax

    names=rgb2name(r,g,b)
                names=rgb2name(rgb)

## Arguments

r,g,b

  RGB integer values of a color.

rgb

  vector of RGB integer values of a color.

names

  names of the color.

## Description

`rgb2name` returns the color name corresponding to the RGB values given by its argument. A vector of color names can also be returned if the color has more than 1 name. `r`, `g` and `b` must be integers between 0 and 255 corresponding to colors components red, green and blue. As usual 0 means no intensity and 255 means all the intensity of the color. RGB values can also be given by a vector `[r,g,b]`.

If no color is found `[]` is returned.

The list of all known colors is given by color_list.

## Examples

    rgb2name(255,128,128)
    rgb2name([255 215 0])
    // get color #10 of the current colormap and find its name
    cmap=get(gcf(),"color_map");
    rgb2name(cmap(10,:)*255)

## See also

- color
- color_list
- name2rgb