add hash in front of hex color codes #21

	# CI handling matplotlib
	name: Matplotlib CI

	on:
	# Trigger the workflow on push or pull request events but only for the "main" branch,
	# for given paths
	push:
	branches: [ "main" ]
	paths: ['src/matplotlib/', 'examples/matplotlib/']
	pull_request:
	branches: [ "main" ]
	paths: ['src/matplotlib/', 'examples/matplotlib/']

	# Allow manual dispatch
	workflow_dispatch:

	jobs:
	matplotlib-example:
	runs-on: ubuntu-latest

	steps:
	# Check-out repository under $GITHUB_WORKSPACE
	- uses: actions/checkout@v3

	# Set up python version and caching using pip
	- uses: actions/setup-python@v4
	with:
	python-version: '3.9'
	cache: 'pip'

	- name: Set up pip dependencies
	run: \|
	pip install numpy scipy matplotlib
	pip install $GITHUB_WORKSPACE

	- name: Create matplotlib example plots
	run: \|
	cd $GITHUB_WORKSPACE/examples/matplotlib
	python3 example.py

	- name: Upload plots
	uses: actions/upload-artifact@v3
	with:
	name: matplotlib-example
	path: ${{ github.workspace }}/examples/matplotlib/example.matplotlib.pdf
	if-no-files-found: error

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