1. A condition in which a person has difficulty distinguishing certain colors, especially red and green, due to a deficiency in color vision.
Usage: Medical/scientific term; Also called color blindness or colour blindness
2. The inability or unwillingness to recognize or acknowledge racial or ethnic differences; the practice of treating all people as if race does not matter.
Usage: Figurative use; Often used in discussions of social policy and equality

Examples

• Red-green colorblindness is the most common form of color vision deficiency.
• People with colorblindness may have difficulty reading certain maps or charts.
• The policy of colorblindness in hiring practices has been criticized by some advocates.
• His colorblindness made it hard for him to distinguish between the red and green traffic lights.
• Critics argue that colorblindness ignores the real effects of historical discrimination.
• Modern approaches to diversity often reject colorblindness in favor of acknowledging differences.