Color blindness (or color vision deficiency) is the reduced ability to distinguish between certain colors. Despite the term, very few people are completely “color blind” (seeing only in black, white, and gray, a condition called achromatopsia). Most people with color blindness can see colors but have difficulty telling some apart. Several tests are used to detect color blindness, ranging from quick screening tools to more precise diagnostic methods. The most common is the Ishihara Test, which uses a series of dot-pattern plates. Each plate displays a number or shape formed by colored dots, designed so that individuals with certain types of color vision deficiencies may struggle to distinguish the figure from the background. This test is quick to administer and highly effective in identifying red-green color blindness.

For a quick Ishihara-style screening: 

• Start by adjusting your screen brightness to a comfortable level
• Holding your device at about arm’s length. 
• Make sure you are in a well-lit area 

Avoid glare or reflections on the screen, as these can affect how the plates appear. 

Keep in mind that the results are intended for awareness only and should not be considered a medical diagnosis.