Presentation on theme: "Chris Burfitt Designing for Colour Blindness. What do we mean by ‘Colour Blind’? Actual colour blindness (Monochromacy) is very rare We’re usually talking."— Presentation transcript:
What do we mean by ‘Colour Blind’? Actual colour blindness (Monochromacy) is very rare We’re usually talking about ‘colour vision deficiency’ (dichromacy) This type affects approximately 8-10% of the male population and 0.5% of the female population The most common form causes confusion between red and green The colour the words above may look very obvious to you, but to a colour blind person the difference is barely noticeable Additionally, even when a difference can be seen, red is often seen as green, and green is seen as red
Traffic Lights….. The most common question asked of a colour blind person is “how do you manage at traffic lights?” The answer demonstrates how colour blindness can be overcome with good design 1.Position The red light is at the top, the green light is at the bottom This allows someone to recognise if the lights are red or green regardless of the colour 2.Hue (tone of colour) The red, green and amber lights are completely different ‘hue’ 3.Saturation (pureness of colour) Traffic lights are specifically designed with high intensity, high saturation (i.e. pure colour) light 3 View this slide in ‘Grayscale’ to demonstrate…..