Color blindness makes it difficult to interpret a piece of information if color plays an important role in how it is represented. Check the Wikipedia page to learn more about color-blindness. To make your game accessible to colorblind people:
- Information should never be symbolized by its color only. It should be associated with a second dimension such as shape, texture, an icon, or a label;
- Create distinguishable color palettes and make sure you have sufficient contrast between these elements and with the background on which they are presented;
- Consider using value contrast in addition to color contrast. If you print everything in grayscale, can you see the differences you need to see?
Here is a list of color combination known to be problematic for people for color-blindness:
|Green & brown||Green & black|
|Green & red||Green & gray|
|Green & blue||Blue & purple|
|Light green & yellow||Blue & gray|
Remember to check:
- Colors that distinguish components;
- Texts readability;
- Graphic elements with which the players interact such as boundaries of zones, icons, or puzzles;
- Low light is often an issue. Verify that you can parse everything you need to in your game even in low light conditions.
To verify your design, some tools can simulate the vision of color blind people:
To reduce reading difficulties caused by color blindness, dyslexia, or poor vision, follow these rules:
- A strong contrast of the text color with the background. There are many online tools like colorshark.io that can help you validate the contrast;
- A simple and clear font with reasonable space between characters (read more);
- A font size readable by all. Font size might have to be different depending on the text location. Text on the board is more difficult to read than cards in your hand.