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Top Forums UNIX for Beginners Questions & Answers Filter valid hexadecimal color codes Post 303045969 by sean96 on Monday 20th of April 2020 11:44:34 AM
Old 04-20-2020
I tried grep -E and it didn't work. I've attached the text file that I am using and I basically want to return valid codes that have a hash symbol and have 6 or 8 characters ranging from A-Z, a-z or 0-9.

Code:
grep -E "^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{8})" colours.txt

 

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