Convert RGB color to English color name, like 'green' with Python

Question

I want to convert a color tuple to a color name, like \'yellow\' or \'blue\'

>>> im = Image.open(\"test.jpg\")
>>> n, color = max(im.getcol         


        

Answer 1

For those who, like me, want a more familiar colour name, you can use the CSS 2.1 colour names, also provided by webcolors:

• aqua: #00ffff
• black: #000000
• blue: #0000ff
• fuchsia: #ff00ff
• green: #008000
• grey: #808080
• lime: #00ff00
• maroon: #800000
• navy: #000080
• olive: #808000
• purple: #800080
• red: #ff0000
• silver: #c0c0c0
• teal: #008080
• white: #ffffff
• yellow: #ffff00
• orange: #ffa500

Just use fraxel's excellent answer and code for getting the closest colour, adapted to CSS 2.1:

def get_colour_name(rgb_triplet):
    min_colours = {}
    for key, name in webcolors.css21_hex_to_names.items():
        r_c, g_c, b_c = webcolors.hex_to_rgb(key)
        rd = (r_c - rgb_triplet[0]) ** 2
        gd = (g_c - rgb_triplet[1]) ** 2
        bd = (b_c - rgb_triplet[2]) ** 2
        min_colours[(rd + gd + bd)] = name
    return min_colours[min(min_colours.keys())]