Julian White Julian White - 9 days ago 6
Python Question

Converting Hex to RGB value in Python

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), however from an end-user perspective we can't ask people to edit code & run from there. How can one prompt the user to enter a hex value and then have it spit out a RGB value from there?

Here's the code I have thus far:

def hex_to_rgb(value):
value = value.lstrip('#')
lv = len(value)
return tuple(int(value[i:i + lv // 3], 16) for i in range(0, lv, lv // 3))


def rgb_to_hex(rgb):
return '#%02x%02x%02x' % rgb

hex_to_rgb("#ffffff") # ==> (255, 255, 255)
hex_to_rgb("#ffffffffffff") # ==> (65535, 65535, 65535)
rgb_to_hex((255, 255, 255)) # ==> '#ffffff'
rgb_to_hex((65535, 65535, 65535)) # ==> '#ffffffffffff'

print('Please enter your colour hex')

hex == input("")

print('Calculating...')
print(hex_to_rgb(hex()))


Using the line
print(hex_to_rgb('#B4FBB8'))
I'm able to get it to spit out the correct RGB value which is (180, 251, 184)

It's probably super simple - I'm still pretty rough with Python.

Answer

I believe that this does what you are looking for:

h = input('Enter hex: ').lstrip('#')
print('RGB =', tuple(int(h[i:i+2], 16) for i in (0, 2 ,4)))

(The above was written for Python 3)

Sample run:

Enter hex: #B4FBB8
RGB = (180, 251, 184)

Writing to a file

To write to a file with handle fhandle while preserving the formatting:

fhandle.write('RGB = {}'.format( tuple(int(h[i:i+2], 16) for i in (0, 2 ,4)) ))
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