My list of useful links.  I add to it as I find new ones.

If you know any that items that should be added let me know.

Fighting FIsh Blue Red Pink Side View Swimming

C olor Blindness Testing Tools

Color Blindness or color deficiency impacts 1/12 men and 1/200 woman.  Red-Green blindness is the most common variant but other types exist.  When design data visualizations, websites, and presentations it is useful to test how the selected color combinations will look to others.  The tools below are useful for this testing.


Yellow FIsh

C ommunity Challenges

 Community Viz Challenges gives you a chance to practice and try new viz approaches.



Annually / Semi-Annually / Bimonthly








Fish Blue Yellow White


Customize the look and create a specific vibe with font selection