I have a paragrep.pl script to grep words showing in paragraph. 
#!/bin/perl
use Getopt::Std;
use utf8::all;
use v5.36;
my %options;
getopts("a",\%options);
my $togrep = shift;
$togrep = qr/$togrep/;
my $lastfile = "";
local $/ = "";
sub printfound($found, $file, $lastfile){
    print "#" x 10, "\n#$file\n" , "#" x 10, "\n" if $file ne $lastfil
+e;
    my ($postmatch, @string);
    while ($found =~ /(?s)(.*?)(?-s)($togrep)/gp){
        my $prematch = $1;
        my $match = $2;
        $postmatch = ${^POSTMATCH};
        $match =~ s/^/\e[1;31m/mg;
        $match =~ s/$/\e[0m/mg;
        push @string, $prematch, $match;
    }
    push @string, $postmatch;
    print join '', @string;
    return $file
}
while (<>) {
    if ($options{a}){
        $lastfile = printfound $_, $ARGV, $lastfile if /$togrep/i;
    }else{
        $lastfile = printfound $_, $ARGV, $lastfile if /\A.*$togrep/i;
    }
}
if ($!) {
    die "unexpected error while reading from: $!";
}

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I write this printfound subroutine to insert color start and end , it's a mess.now I have more needs to colorize matched pattern, I guess there must some module can do the work nicely.

In reply to grep with color module of perl by vincentaxhe

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