Color blindness is the inability to distinguish between some colors. About 8-10% of males and 0.5% of females have some form of color blindness, making it important for web designers to consider. The most common type is red-green color blindness. Websites should use variations in brightness, testing, and colorblindness tools to ensure color combinations are still usable for those with color blindness. Examples of good practices include using distinct colors and avoiding relying solely on color to convey information in graphs, maps, or other visual elements.

1. Web Design for Color Blind
Users

2. Introduction
Color Blindness
Why should we consider this issue?
How can we create a assessable site for the
colorblind?
Examples of websites
Conclusions
Q & A
REFERENCES

3. Color blindness is inability to perceive
differences between some of the colors
Hereditary genetic disorder
 8 to 10 % men & 0.5 % women

4.  Primary (Red, Green, Blue) colors
What are the primary
colors ?
 By mixing together various amounts of red, green
and blue light, you can make almost any color.
 The most common examples of this are television
screens and computer monitors.

5. Types color blindness
Monochromacy
• Rod monochromacy (Achromatopsia)
• Cone monochromacy
Dichromacy
• Protanopia
• Deuteronopia
• Tritanopia
Trichromacy
• Protanomaly
• Deuteranomaly
• Tritanomaly

6.  Web site accessible
 A high percentage of users
 Ranked well with the search engines
 professional
 Targeting smartphones, and similar
technological devices

7.  Testing
1-
Test 1 Test 2
2- Color Scheme Designer
3- Test the Image
4- Colorblind Web Page Filter

8. Good Examples
 Google
 Humble Indie Bundle

9. Bad Examples
 www.bbc.co.uk/sport/football/tables
 www.google.ca/analytics

10.  Good Color Combinations
Bad Color Combinations

11. Graphs and Maps

12. Bottom
Color Name

13. Color blindness is inability to distinguish among some
color combinations. colorblind about 8-10% of males and 0.5%
of females, so it is common enough to be an important factor in
a high degree of design. The color combinations red-green color
blindness is the most common, followed by color blindness,
yellow and blue.
To avoid problems for users with color blindness, make
sure that the distinctive color objects. Using variations in
brightness to make the colored areas distinct, and test your
interfaces in some website has special tool and grayscale to
confirm that they are still usable.

14. WIKI Link : https://dal.ca.campuspack.net/Groups/CSCI_6606_-
_Human_Factors_in_On-Line_Information_Systems_-
_2013/Seminar_Presentations_-_CSCI_6606/Color_Blindness_and_Web_site

15.  Berson EL. Visual function testing: clinical correlations. In: Tasman W, Jaeger EA,
eds. Duane's Foundations of Clinical Ophthalmology 15th ed. Philadelphia, Pa:
Lippincott Williams & Wilkins; 2009:chap 14.
 Brettel, H., Vienot, F. & Mollon, J.D. (1997). Computerized simulation of color
appearance for dichormats. Journal of the Optical Society of American A, 14, 10.
2647-2655.
 Newman, Chuck (2000). Considering the Color-Blind. Web Techniques.
 Parise, Mario (2005). Color Theory for the Color-Blind. Digital Web Magazine.