Improve color contrast in TSV charts

[HeatherBrooks]

I received this question through the WikiWatershed contact form:

Is there any way in Time Series Visualization to customize the line thickness and/or color? Some of the folks I work with have a tough time distinguishing the light blue and green on their computers.

I know that it is not currently possible to customize TSV. As low hanging fruit, increasing the contrast of the colors used in the plots would help users and increase accessibility.

Running the current colors on this example through the WebAIM contrast checker yields these results:

• Blue: Fails for graphical elements on a white background.
• Green: Fails.
• Orange: Fails.
• Pink: Passes but may not pass for red/green color blindness.
• Secondary blue: Passes.

Thanks for considering!