Symptoms of Colour Blindness Symptoms of colour blindness range from mild confusion between colours to complete inability to perceive any colour. Most people with colour blindness experience partial difficulty distinguishing between certain shades rather than complete colour loss. The symptoms are often subtle, particularly in children, and may go unnoticed until colour-dependent tasks are introduced. The primary symptom is the inability to differentiate between certain colours. In red-green colour blindness, individuals may: Blue-yellow colour blindness leads to difficulty distinguishing blue from green and yellow from violet or grey. Individuals may also see colours as duller than usual or have trouble identifying pastel tones and gradients. Symptoms of Colour Blindness People with complete colour blindness (achromatopsia) see the world in shades of grey. They also often have light sensitivity, poor visual acuity, and may require visual aids. This condition is extremely rare and usually evident from a very early age. In children, symptoms might include: Acquired colour blindness may present differently, with a gradual fading of colours or changes in colour intensity. It often affects both eyes but not always equally. If the change is sudden, it should be treated as a medical concern, as it may be a sign of an underlying neurological or ocular condition. Symptoms of Colour Blindness Diagnosis is often delayed in children because they assume their perception is normal. Teachers and parents are usually the first to notice signs when children struggle with colouring, pattern matching, or using coloured learning materials. To summarise, the symptoms of colour blindness vary in severity and presentation depending on the type. Early identification—especially in educational settings—can help children and adults develop coping strategies and use supportive tools to succeed in daily tasks. [Next: Diagnosis of Colour Blindness →]