Hex Color Code – Python HackerRank Solution

Problem: Hex Color Code

CSS colors are defined using a hexadecimal (HEX) notation for the combination of Red, Green, and Blue color values (RGB).

Specifications of HEX Color Code

■ It must start with a ‘#‘ symbol.
■ It can have 3 or 6 digits.
■ Each digit is in the range of 0 to F. (1,2,3,4,5,6,7,8,9,0,A,B,C,D,E and F).
■  A-F letters can be lower case. (a,b,c,d,e and f are also valid digits).

Examples

Valid Hex Color Codes
#FFF 
#025 
#F0A1FB 

Invalid Hex Color Codes
#fffabg
#abcf
#12365erff

You are given N lines of CSS code. Your task is to print all valid Hex Color Codes, in order of their occurrence from top to bottom.

CSS Code Pattern

Selector
{
	Property: Value;
}

Input Format

The first line contains N, the number of code lines.
The next N lines contains CSS Codes.

Constraints

0 <N<50

Output Format

Output the color codes with ‘#‘ symbols on separate lines.

Sample Input

11
#BED
{
    color: #FfFdF8; background-color:#aef;
    font-size: 123px;
    background: -webkit-linear-gradient(top, #f9f9f9, #fff);
}
#Cab
{
    background-color: #ABC;
    border: 2px dashed #fff;
}   

Sample Output

#FfFdF8
#aef
#f9f9f9
#fff
#ABC
#fff

Explanation

#BED and #Cab satisfy the Hex Color Code criteria, but they are used as selectors and not as color codes in the given CSS.

Hence, the valid color codes are:

#FfFdF8
#aef
#f9f9f9
#fff
#ABC
#fff

Note: There are no comments ( // or /* */) in CSS Code.

Code:

#Hex Color Code Python HackerRank solution
import re

for _ in range(int(input())):
    matches = re.findall(r':?.(#[0-9a-fA-F]{6}|#[0-9a-fA-F]{3})', input())
    if matches:
        print(*matches, sep='\n')
#Hex color code hackerrank solution

Disclaimer: This problem is originally created and published by HackerRank, we only provide solutions to this problem. Hence, doesn’t guarantee the truthfulness of the problem. This is only for information purposes.