Changing the default colors and style of matplotlib has proven to be a much larger task than initially thought, but we are finally approaching the release.
For the full details of what has been changed see a draft of the release notes.
The current pre-release is v2.0.0rc2
You can install pre-releases via
pip install --pre matplotlib
which has source + wheels for Mac, Win, and manylinux or
conda install -c conda-forge/label/rc -c conda-forge matplotlib
which has binaries for Mac, Win, and linux. You can also install from
git clone https://github.com/matplotlib/matplotlib.git cd matplotlib git checkout v2.0.0rc2
wget https://github.com/matplotlib/matplotlib/archive/v2.0.0rc2.tar.gz -O matplotlib-v2.0.0rc2.tar.gz tar -xzvf matplotlib-v2.0.0rc2.tar.gz cd matplotlib-v2.0.0rc2
pip install -v .