Converting Hex to RGB value in Python

Question

Working off Jeremy\'s response here: Converting hex color to RGB and vice-versa I was able to get a python program to convert preset colour hex codes (example #B4FBB8), howe

Answer 1

As HEX codes can be like "#FFF", "#000", "#0F0" or even "#ABC" that only use three digits. These are just the shorthand version of writing a code, which are the three pairs of identical digits "#FFFFFF", "#000000", "#00FF00" or "#AABBCC".

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This function is made in such a way that it can work with both shorthands as well as the full length of HEX codes. Returns RGB values if the argument hsl = False else return HSL values.

import re

def hex_to_rgb(hx, hsl=False):
    """Converts a HEX code into RGB or HSL.
    Args:
        hx (str): Takes both short as well as long HEX codes.
        hsl (bool): Converts the given HEX code into HSL value if True.
    Return:
        Tuple of length 3 consisting of either int or float values."""
    if re.compile(r'#[a-fA-F0-9]{3}(?:[a-fA-F0-9]{3})?$').match(hx):
        div = 255.0 if hsl else 0
        if len(hx) <= 4:
            return tuple(int(hx[i]*2, 16) / div if div else
                         int(hx[i]*2, 16) for i in (1, 2, 3))
        else:
            return tuple(int(hx[i:i+2], 16) / div if div else
                         int(hx[i:i+2], 16) for i in (1, 3, 5))
    else:
        raise ValueError(f'"{hx}" is not a valid HEX code.')

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Here are some IDLE outputs.

>>> hex_to_rgb('#FFB6C1')
>>> (255, 182, 193)

>>> hex_to_rgb('#ABC')
>>> (170, 187, 204)

>>> hex_to_rgb('#FFB6C1', hsl=True)
>>> (1.0, 0.7137254901960784, 0.7568627450980392)

>>> hex_to_rgb('#ABC', hsl=True)
>>> (0.6666666666666666, 0.7333333333333333, 0.8)

>>> hex_to_rgb('#00FFFF')
>>> (0, 255, 255)

>>> hex_to_rgb('#0FF')
>>> (0, 255, 255)