Where you’ve used green/red colour coding
Posted: Mon Dec 23, 2024 7:23 am
This problem is common in data visualisation as colours are often used to highlight comparative data points. For example, green and red are frequently used to show positive and negative results. Though this is common colour coding, red and green is one of the most troublesome colour combinations for people with CVD.
A simple fix is adding ticks and crosses .
A green circle and a red circleA green circle with a white text in the center, a red circle with a white cross in the center
However, a common misunderstanding is that people phone code for tunisia with red/green CVD only confuse red and green. In fact, they can confuse any colours with red or green in them (e.g., blue and purple may look similar). There are also multiple types of CVD involving different colour combinations so it’s not just red/green objects that you need to keep an eye on.
The chart below relies on the audience being able to differentiate the colours in the legend to understand the information. We’ve applied a simulation of one type of CVD, Deuteranopia, to the chart on the right and you can see how difficult it is to understand the information.
Two doughnut charts on a slide. The one of the left is in shades of green and red and has a legend to the right. The one on the right is shades of yellow with a key on the right.
However, if you add clear data labels to each segment of the chart, your audience will still be able to understand the information, regardless of their access to colour.
The same doughnut charts as before, however, instead of a legend to the side, each segment is individually labeled with the category name and percentage.
A simple fix is adding ticks and crosses .
A green circle and a red circleA green circle with a white text in the center, a red circle with a white cross in the center
However, a common misunderstanding is that people phone code for tunisia with red/green CVD only confuse red and green. In fact, they can confuse any colours with red or green in them (e.g., blue and purple may look similar). There are also multiple types of CVD involving different colour combinations so it’s not just red/green objects that you need to keep an eye on.
The chart below relies on the audience being able to differentiate the colours in the legend to understand the information. We’ve applied a simulation of one type of CVD, Deuteranopia, to the chart on the right and you can see how difficult it is to understand the information.
Two doughnut charts on a slide. The one of the left is in shades of green and red and has a legend to the right. The one on the right is shades of yellow with a key on the right.
However, if you add clear data labels to each segment of the chart, your audience will still be able to understand the information, regardless of their access to colour.
The same doughnut charts as before, however, instead of a legend to the side, each segment is individually labeled with the category name and percentage.