deepin-picker doesn't launch

[Lonnie Lee Best]

sudo apt install deepin-picker

After installation, I've tried numerous times to launch deepin-picker and that only indication I see that it is trying to launch is a change in my mouse cursor when hovering over the taskbar. Then that goes away and no application window ever appears.

I'm trying to find an alternative for gcolor2. Neither gcolor2 or gcolor3 is in the repositories and that needs to change.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: deepin-picker 1.6.4-1
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed May 8 19:04:05 2019
InstallationDate: Installed on 2019-01-07 (121 days ago)
InstallationMedia: Ubuntu 16.04.5 LTS "Xenial Xerus" - Release amd64 (20180731)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: deepin-picker
UpgradeStatus: Upgraded to disco on 2019-04-21 (17 days ago)

[Lonnie Lee Best (launchpad-startport)]

As a work-around I'm using kcolorchooser
sudo apt install kcolorchooser

[Yangfl (mmyangfl)]

Maybe https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=928723

Could you try enabling software compositing?