Go to https://gitlab.com/mattia.basaglia/Qt-Color-Widgets for the current version.
Sadly, GitHub has been acquired by Microsoft, which has a history of actively trying to destroy or undermine the open source / free software movement. See the Halloween documents for some examples of this.
For this reason I'm not comfortable hosting my open source code in Microsoft's infrastructure and all my repositories have been moved to GitLab.
For webview, replace https://github.com/mbasaglia/Qt-Color-Widgets with https://gitlab.com/mattia.basaglia/Qt-Color-Widgets
For SSH remotes replace
git@github.com:mbasaglia/Qt-Color-Widgets.git with
git@gitlab.com:mattia.basaglia/Qt-Color-Widgets.git
For HTTPS remotes replace
https://github.com/mbasaglia/Qt-Color-Widgets.git with
https://gitlab.com/mattia.basaglia/Qt-Color-Widgets.git