Wrong colors when making a window screenshot

[Hadrien]

This is on Ubuntu 17.10 (development branch) and gnome-screenshot 3.25.0

Open a Gnome terminal
Make a screenshot by calling gnome-screenshot -w
Open the created png

Expected result: the png shows the Gnome terminal window with colors matching the ones displayed
Actual result: the orange close button looks blue instead of orange. Maybe the red and blue channels are inverted.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-screenshot 3.25.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
Uname: Linux 4.13.0-12-generic x86_64
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Oct 1 11:47:27 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-01-03 (270 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-screenshot
UpgradeStatus: Upgraded to artful on 2017-09-30 (1 days ago)

[Hadrien (psydk)]

Maybe the same bug than #1672716 but I did not experiment it with 17.04. Only with 17.10.

[Hadrien (psydk)]

I found this upstream ticket: https://bugzilla.gnome.org/show_bug.cgi?id=787026
which duplicates this one: https://bugzilla.gnome.org/show_bug.cgi?id=779234

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alberto Donato (ack)]

I have the same issue in current Bionic (prerelease) with gnome-screenshot 3.25.0-0ubuntu2.

This only seems to happen when I screenshot a window (ctrl-alt-print), a full screenshot is correct.
Attached wrong and correct samples.

[Hadrien (psydk)]

Ubuntu 18.04: taking a screenshot of a window now gives the expected color.

We may close this bug unless someone still have the issue on his side.

[Hadrien (psydk)]

No problem with Ubuntu 20.04. I will close this ticket.