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79 lines
1.6 KiB
Markdown
79 lines
1.6 KiB
Markdown
---
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id: 6821ebfd237de8297eaee799
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title: "Challenge 23: RGB to Hex"
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challengeType: 29
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dashedName: challenge-23
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---
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# --description--
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Given a CSS `rgb(r, g, b)` color string, return its hexadecimal equivalent.
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Here are some example outputs for a given input:
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| Input | Output |
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|---------|----------|
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| `"rgb(255, 255, 255)"`| `"#ffffff"` |
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| `"rgb(1, 2, 3)"` | `"#010203"` |
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- Make any letters lowercase.
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- Return a `#` followed by six characters. Don't use any shorthand values.
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# --hints--
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`rgb_to_hex("rgb(255, 255, 255)")` should return `"#ffffff"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(rgb_to_hex("rgb(255, 255, 255)"), "#ffffff")`)
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}})
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```
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`rgb_to_hex("rgb(1, 11, 111)")` should return `"#010b6f"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(rgb_to_hex("rgb(1, 11, 111)"), "#010b6f")`)
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}})
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```
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`rgb_to_hex("rgb(173, 216, 230)")` should return `"#add8e6"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(rgb_to_hex("rgb(173, 216, 230)"), "#add8e6")`)
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}})
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```
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`rgb_to_hex("rgb(79, 123, 201)")` should return `"#4f7bc9"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(rgb_to_hex("rgb(79, 123, 201)"), "#4f7bc9")`)
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}})
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```
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# --seed--
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## --seed-contents--
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```py
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def rgb_to_hex(rgb):
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return rgb
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```
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# --solutions--
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```py
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def rgb_to_hex(rgb):
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import re
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match = re.findall(r'\d+', rgb)
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r, g, b = [max(0, min(255, int(x))) for x in match[:3]]
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return f'#{r:02x}{g:02x}{b:02x}'
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```
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