We build open-source tools and help teams visualize their data.

Open tools for expressive data

Over the past years, we've delivered dozens of successful projects, reached hundreds of thousands of downloads of our open-source software, and helped thousands of people with their data work.

yellow sunflower

yellow sunflower is an open source and consulting company, that focuses on data visualization. To find out more, read the announcement's blog post.

open source

consulting

Open source

Open source is at the core of yellow sunflower. All projects are released under permissive licenses and designed to be simple, useful, and easy to extend.

pypalettes Python package official logo
pypalettes
A large (+2500) collection of color maps for Python
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matplotlibcolor
pyfonts Python package official logo
pyfonts
A simple and reproducible way of using fonts in matplotlib
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matplotlibfontreproductibility
morethemes Python package official logo
morethemes
More themes for matplotlib
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matplotlibtheme
drawarrow Python package official logo
drawarrow
Drawing arrows for matplotlib made easy
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matplotlibarrow
dayplot Python package official logo
dayplot
Calendar heatmaps with matplotlib
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matplotlibcalendarheatmap
bumplot Python package official logo
bumplot
Easily create and customize bump charts in Python
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matplotlibbumpcurve

Want to contribute? Great! It's all happening on Github.


Need help getting started? No problem, just open an issue with your questions!

data consulting

yellow sunflower helps teams turn raw data into clear insights. We provide custom data visualization, reproducible analysis pipelines, and open-source tool integration to make your data work for you.

Whether you need dashboards for decision-making, automated reporting, or guidance on modern data workflows, we can support you from design to deployment.

Get In Touch

I’d love to hear from you! Whether you have a question, want to collaborate, or just want to say hi, feel free to drop a message below.

joseph.barbierdarnal@gmail.com