Color blindness frequency by race/ethnicity: what the evidence supports

Analysis

Color blindness frequency by race/ethnicity: what the evidence supports

Short thesis — what seems most likely true

For congenital red-green color vision deficiency, prevalence does appear to vary across populations, but the cleanest conclusion is narrower than many casual summaries imply: sex matters most, and ancestry/ethnicity shifts the baseline within males more than within females. The best-known benchmark is about 8% of men of Northern/European Caucasian ancestry versus roughly 4% to 6.5% of Chinese and Japanese men. In a U.S. population-based preschool study, prevalence in boys was highest in non-Hispanic white children (5.6%) and lowest in black children (1.4%), with Asian (3.1%) and Hispanic (2.6%) boys in between. Female prevalence was low across groups, generally around 0% to 0.5% in the childhood data.

What researchers broadly find

• Most race/ethnicity comparisons are really comparisons across ancestry, ethnicity, or national populations, not biologically precise "races."

• The dominant inherited form is red-green CVD, which is usually X-linked, so male prevalence is several-fold higher than female prevalence in every population studied.

• Population differences are real enough to show up repeatedly, but effect sizes vary depending on age, test method, country, migration history, and whether the paper reports males only or both sexes combined.

• Newer pooled meta-analyses still find heterogeneity by ancestry and region, but they also show how much the sex mix and study mix can compress apparent between-group gaps.

Best-supported prevalence ranges

1) Classic benchmark: European ancestry higher than East Asian male prevalence

A 2012 review of worldwide inherited red-green color deficiency reported that prevalence is about 8% in European Caucasian men and about 0.4% in European Caucasian women. The same review reported 4% to 6.5% in men of Chinese and Japanese ethnicity.

That is still the clearest widely cited summary for male prevalence differences by ancestry. It supports a real gap, but not a huge one: the common pattern is higher in men of Northern/European ancestry than in several East Asian populations.

2) U.S. multi-ethnic childhood data: white boys highest, black boys lowest

The Multi-Ethnic Pediatric Eye Disease Study (Southern California preschool children) found the following prevalence in boys:

• Black: 1.4%

• Asian: 3.1%

• Hispanic: 2.6%

• Non-Hispanic white: 5.6%

In girls, prevalence was 0.0% to 0.5% across all ethnicities.

This is one of the strongest direct U.S. ethnicity-specific datasets because it is population-based rather than clinic-based. It suggests that within the U.S. child population, non-Hispanic white boys had the highest observed prevalence and black boys the lowest.

3) Newer pooled evidence: overall ancestry gaps look smaller when both sexes are combined

A 2025 systematic review/meta-analysis of children and adolescents estimated:

• Global overall prevalence: 2.59%

• Males: 4.38%

• Females: 0.64%

• European descent: 2.77% overall

• African descent: 2.69% overall

These pooled ancestry estimates are useful, but they should not be read as contradicting the older male-specific findings. They are overall estimates that combine boys and girls and aggregate many studies with different methods.

4) Africa-specific pooled estimate

A 2024 Africa systematic review/meta-analysis found:

• Overall pooled prevalence in Africa: 2.71%

• African males: 2.13%

• African females: 0.34%

That is broadly consistent with the idea that many African populations have lower male prevalence than classic Northern European benchmarks, while still showing the same strong male predominance.

Why the literature looks inconsistent at first glance

Several things make the numbers look more contradictory than they really are:

• Sex mix: male-only prevalence can be much higher than combined-sex prevalence.

• Age mix: child, school, and all-age studies are not identical.

• Definition mix: some papers focus tightly on congenital red-green deficiency; others report broader CVD.

• Population labels: "black," "Asian," "Hispanic," "European," and "African" are not interchangeable scientific units.

• Founder effects and drift: reviews often attribute between-population differences more to population history than to selection.

Bottom line

If the question is specifically about red-green inherited color blindness, the best short answer is:

• it is much more common in males than females;

• among males, it is often reported at roughly 5% to 8% in populations of European ancestry;

• it is often somewhat lower in several East Asian and African populations;

• and in one strong U.S. childhood dataset, non-Hispanic white boys had the highest prevalence and black boys the lowest.

What the evidence does not support is a neat universal ranking of all "races." The measured differences depend heavily on which population, which age group, and which definition of color vision deficiency is being used.

Sources

• Birch J. Worldwide prevalence of red-green color deficiency. J Opt Soc Am A Opt Image Sci Vis. 2012. https://pubmed.ncbi.nlm.nih.gov/22472762/

• Xie WZ et al. Color vision deficiency in preschool children: the multi-ethnic pediatric eye disease study. Ophthalmology. 2014. https://pubmed.ncbi.nlm.nih.gov/24702753/

• Xie WZ et al. full text. https://pmc.ncbi.nlm.nih.gov/articles/PMC4839481/

• Global Prevalence of Congenital Color Vision Deficiency among Children and Adolescents, 1932-2022. Ophthalmology. 2025. https://pubmed.ncbi.nlm.nih.gov/40769301/

• Prevalence of color vision deficiency in Africa: Systematic review and meta-analysis. 2024. https://pubmed.ncbi.nlm.nih.gov/39630815/

Medical caution: this is an evidence summary, not individualized medical advice. Acquired color vision loss can have very different causes and does not follow the inherited red-green prevalence pattern above.