Features

• Added support for transparency / alpha values, see #131 and #162 (@superhawk610)
• Added support for NO_COLOR environment variable, see #143 (@djmattyg007)
• Added new color pickers: Gnome/Wayland via gdbus, zenity, yad, and wcolor (@sigmaSd, @pvonmoradi)

Packaging

• Added shell completion files again, see #166 (@sharkdp)