GTK3 Libreoffice default theme is too dark

[Amr Ibrahim]

Libreoffice default theme became too dark. I think it is a problem with switching to GTK3. See the attached screenshot.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: libreoffice-core 1:5.1.2-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-16.32-generic 4.4.6
Uname: Linux 4.4.0-16-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Apr 14 17:48:21 2016
ExecutablePath: /usr/lib/libreoffice/program/soffice.bin
InstallationDate: Installed on 2016-03-29 (15 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323)
SourcePackage: libreoffice
UpgradeStatus: No upgrade log present (probably fresh install)

[Björn Michaelsen (bjoern-michaelsen)]

Note libreoffice-gtk3 isnt installed in the default (yet) and libreoffice-gtk (2) is used instead, which works fine.

[Launchpad Janitor (janitor)]

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

[Jason Benjamin (red-hax0r)]

LibreOffice is written using Swing and there are two plugins: one for gtk2 and one for gtk3. I've noticed that no matter what icon set is used the gtk3 theme is too dark. In other places like in the configuration dialogues the text is only slightly brighter than the button background and is virtually unreadable.

It would be nice if LibreOffice were written using SWT by Eclipse instead so that it wraps the native system libraries of gtk2/3.

Also I sometimes wonder if the Ubuntu theme system is due in for an overhaul. I've tried Ubuntu with alternative themes (the ones I thought recommended) and they don't even look right on Ubuntu.