How many people are colour blind?
Colour (color) blindness (colour vision deficiency, or CVD) affects approximately 1 in 12 men and 1 in 200 women in the world. In Britain, this means that there are approximately 2.7 million colour blind people (about 4.5% of the entire population), most of whom are male. So with nearly 100,000 iFootpath App users, it’s not surprising that we have been asked for some help with colours and the map. This Expert Guide will show you how to adjust your phone’s settings to help those with colour blindness see things a little better.
Most colour blind people are able to see things as clearly as other people, but they are unable to fully ‘see’ red, green or blue light. There are different types of colour blindness and there are extremely rare cases where people are unable to see any colour at all.
The most common form of colour blindness is known as red/green colour blindness and most colour blind people suffer from this. Although known as red/green colour blindness this does not mean sufferers mix up red and green, it means they mix up all colours which have some red or green as part of the whole colour. For example, a red/green colour blind person will confuse a blue and a purple because they can’t ‘see’ the red element of the colour purple.
How do I know whether I am colour blind?
There are several Apps and online tests that can help you understand whether you have a colour vision deficiency. Or you could ask your optician to test you. Please note that there is no cure for colour vision deficiency - here is some further information about Inherited Colour Vision Deficiency.
Can you see the square and the faint brown circle?
Adjusting your phone settings is easy
Both Apple and Android have tried to address and help colour vision deficiency by adding some colour settings to change the way you see colours on the screen. With the Colour Correction enabled on your device, it will affect everything you see on your phone or tablet’s display, including full-screen content like videos and games for example. However, the colour changes won’t be shown in any screenshots you take.
Android offers a Colour Correction mode which enables your device to compensate for colour blindness with one of the following options:
To activate the filters.
Open Settings > Accessibility > Colour Correction. You should then be able to tap and choose what colour correction you would like to try.
Apple offers a few more filters and settings than Android.
Open Settings, go to General > Accessibility and then select Display Accommodation.
Tap the option called Colour Filters
Below, you’ll see three filters. Red/Green, Green/Red, and Blue/Yellow. They compensate for Protanopia, Deuteranopia, and Tritanopia. You’ll see sample photos at the top. Swipe between them after enabling the different filters to see previews and how the filters look to your eyes. This will help you make the right filter choice.
Let us know how you get on…
So, if do have colour blindness please try out the colour filters and let us know whether it helps with following the GPX track on the iFootpath App. We have tried to create an example of how colours are changed below - but as we mentioned above it's not possible to capture a screenshot with these changes so we have had to take a snap of a phone's screen.
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Please visit our Help Centre if you are looking for help in using the iFootpath website and App.