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phetsims / fluid-pressure-and-flow

"Fluid Pressure and Flow" is an educational simulation in HTML5, by PhET Interactive Simulations.
GNU General Public License v3.0
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Water color has poor contrast against sky background #327

Open arouinfar opened 5 years ago

arouinfar commented 5 years ago

For #325

Colorblind testing on Java version can be found here: https://phet.unfuddle.com/a#/projects/9404/tickets/by_number/3351

Generally, things look pretty acceptable. However, there is poor contrast between the stream of water and the sky background, particularly for protanopia and deuteranopia.

dev.19 image

Protanopia image

Deuteranopia image

Changing the color of the water to be less cyan-y and more similar to the neutral color used in pH Scale will improve this contrast. However, the fluid color depends on its density, which is a gradient between gasoline gray, water blue, and honey yellow.

image

Using a blue more similar to pH Scale would mean the color gradient would look more like this, which doesn't seem ideal. image

@ariel-phet can you review? Is the current color for water good enough, or should I spend a bit more time trying to find something that both good contrast and a nice-looking color gradient?

ariel-phet commented 5 years ago

Will reevaluate when we (hopefully) revisit this sim fully.