Yeah, agreed that getting people to answer questions using the chart, and measuring their speed and accuracy is the key objective metric of design quality.
Also, I like it when both color and line styles are used together. Keeps it clear for colorblind people, and makes it extra clear for colorsighted people.
Choosing colors should be done carefully to balance contrast with the background color. And can be done in such a way as to be visible even to the most common colorblindness types.
Yeah, agreed that getting people to answer questions using the chart, and measuring their speed and accuracy is the key objective metric of design quality. Also, I like it when both color and line styles are used together. Keeps it clear for colorblind people, and makes it extra clear for colorsighted people. Choosing colors should be done carefully to balance contrast with the background color. And can be done in such a way as to be visible even to the most common colorblindness types.