If you are using Build.PL define the {requires}{perl} = VERSION field. If you are using MakeMaker (Makefile.PL) you should upgrade ExtUtils::MakeMaker to 6.48 and use MIN_PERL_VERSION parameter. Perl::MinimumVersion can help you determine which version of Perl your module needs.

Add 'use warnings' (or its equivalents) to all modules, or convince us that your favorite module is well-known enough and people can easily see the modules warn when something bad happens.

Error: HashData::Color::CMYK::ToutesLesCouleursCom, HashData::Color::CMYK::ToutesLesCouleursCom::Black, HashData::Color::CMYK::ToutesLesCouleursCom::Blue, HashData::Color::CMYK::ToutesLesCouleursCom::Brown, HashData::Color::CMYK::ToutesLesCouleursCom::Gray, HashData::Color::CMYK::ToutesLesCouleursCom::Green, HashData::Color::CMYK::ToutesLesCouleursCom::Orange, HashData::Color::CMYK::ToutesLesCouleursCom::Pink, HashData::Color::CMYK::ToutesLesCouleursCom::Purple, HashData::Color::CMYK::ToutesLesCouleursCom::Red, HashData::Color::CMYK::ToutesLesCouleursCom::White, HashData::Color::CMYK::ToutesLesCouleursCom::Yellow