What is the color blindness filter for email previews?
Color blindness affects 8% of the male population around the world, leading to various degrees of what is known as “color deficiency,” or difficulty distinguishing between different colors. While many different types of color blindness exist, the majority of color blind individuals are unable to distinguish differences between red and green.
Usability and accessibility principles for web design encourage sufficient color contrast in text and images to ensure that content is easily distinguishable. While we recognize that not all web design principles are applicable to email design, color blindness surely does.
We now offer an option for Email Previews in Litmus that allows you to simulate what a person with a red-green color deficiency might see when viewing your email:
This option can be selected within the New Email Test page under "Also include: Color Blindess" at the bottom of the page.