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Fixed problem with math for number of people (#20711)

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Fixed problem with math for number of people, text says 1 in 20 people have color blindness and then it later says that is almost 1 billion people... that would be true if population of earth was 20 billion.
Also fixed one spelling mistake that I noticed.
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Nenad Anđelković
2018-11-01 06:32:45 +01:00
committed by Huyen Nguyen
parent 32b54e8706
commit 6807d332d7
1 changed files with 2 additions and 2 deletions
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guide/english/visual-design/color-theory/usability/index.md
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@ -6,10 +6,10 @@ title: Color and Usability
Like the variances in [representation of color by visual displays](/visual-design/color-theory/index.md), human eyes and brain interpret colors in a variety of ways.
About one in twenty people have color blindness.[2]
That's almost a billion people!
That's almost a 376 million people!
Color blindness is when a range of different colors are interpreted as hues of one color.
Sometimes a person does not know that they experience color blindness, because the colors "look normal" to them.
This has serious implications for contrasting colors between letters and their backgrounds, and for alerts, where color coveys a context of importance for example.
This has serious implications for contrasting colors between letters and their backgrounds, and for alerts, where color conveys a context of importance for example.
Even something as simple as conveying 'stop' and 'go' is problematic, since the most common form of color blindness is where red and green appear the same.