freeCodeCamp/curriculum/challenges/english/99-dev-playground/daily-coding-challenges-python/python-challenge-23.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
6821ecc5237de8297eaee7a5	Python Challenge 23: RGB to Hex	29	python-challenge-23

--description--

Given a CSS rgb(r, g, b) color string, return its hexadecimal equivalent.

Here are some example outputs for a given input:

Input	Output
"rgb(255, 255, 255)"	"#ffffff"
"rgb(1, 2, 3)"	"#010203"

• Make any letters lowercase.
• Return a # followed by six characters. Don't use any shorthand values.

--hints--

rgb_to_hex("rgb(255, 255, 255)") should return "#ffffff".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(rgb_to_hex("rgb(255, 255, 255)"), "#ffffff")`)
}})

rgb_to_hex("rgb(1, 11, 111)") should return "#010b6f".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(rgb_to_hex("rgb(1, 11, 111)"), "#010b6f")`)
}})

rgb_to_hex("rgb(173, 216, 230)") should return "#add8e6".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(rgb_to_hex("rgb(173, 216, 230)"), "#add8e6")`)
}})

rgb_to_hex("rgb(79, 123, 201)") should return "#4f7bc9".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(rgb_to_hex("rgb(79, 123, 201)"), "#4f7bc9")`)
}})

--seed--

--seed-contents--

def rgb_to_hex(rgb):

    return rgb

--solutions--

def rgb_to_hex(rgb):
    import re
    match = re.findall(r'\d+', rgb)
    r, g, b = [max(0, min(255, int(x))) for x in match[:3]]
    return f'#{r:02x}{g:02x}{b:02x}'