Editing Brown (section)

=== Brown eyes ===
{{main|Eye color#Brown}}

With few exceptions, all mammals have brown or darkly-pigmented irises.<ref>{{cite journal | url=https://pubmed.ncbi.nlm.nih.gov/19278018/ | pmid=19278018 | year=2009 | last1=Bradley | first1=B. J. | last2=Pedersen | first2=A. | last3=Mundy | first3=N. I. | title=Blue eyes in lemurs and humans: Same phenotype, different genetic mechanism | journal=American Journal of Physical Anthropology | volume=139 | issue=2 | pages=269–273 | doi=10.1002/ajpa.21010 }}</ref> In humans, brown eyes result from a relatively high concentration of [[melanin]] in the [[stroma of iris|stroma]] of the iris, which causes light of both shorter and longer wavelengths to be absorbed<ref>Fox, Denis Llewellyn (1979). Biochromy: Natural Coloration of Living Things. University of California Press. p. 9. {{ISBN|0-520-03699-9}}.</ref><ref>{{cite journal |author=Eiberg H, Mohr J |title=Assignment of genes coding for brown eye colour (BEY2) and brown hair colour (HCL3) on chromosome 15q |journal=Eur. J. Hum. Genet. |volume=4 |issue=4 |pages=237–41 |year=1996 |pmid=8875191 |doi=10.1159/000472205|s2cid=26700451 }}</ref> and in many parts of the world, it is nearly the only iris color present.<ref>{{OMIM|227220|SKIN/HAIR/EYE PIGMENTATION, VARIATION IN, 1; SHEP1}}</ref> Dark pigment of brown eyes is most common in [[East Asia]], [[Central Asia]], [[Southeast Asia]], [[South Asia]], [[West Asia]], [[Oceania]], [[Africa]], [[Americas]], etc. as well as parts of [[Eastern Europe]] and [[Southern Europe]].<ref name="Sulem">{{cite journal |title=Genetic determinants of hair, eye and skin pigmentation in Europeans |journal=Nat. Genet. |volume=39 |issue=12 |pages=1443–52 |year=2007 |pmid=17952075 |doi=10.1038/ng.2007.13 |last1=Sulem |first1=Patrick |last2=Gudbjartsson |first2=Daniel F |last3=Stacey |first3=Simon N |last4=Helgason |first4=Agnar |last5=Rafnar |first5=Thorunn |last6=Magnusson |first6=Kristinn P |last7=Manolescu |first7=Andrei |last8=Karason |first8=Ari |last9=Palsson |first9=Arnar |last10=Thorleifsson |first10=Gudmar |last11=Jakobsdottir |first11=Margret |last12=Steinberg |first12=Stacy |last13=Pálsson |first13=Snæbjörn |last14=Jonasson |first14=Fridbert |last15=Sigurgeirsson |first15=Bardur |last16=Thorisdottir |first16=Kristin |last17=Ragnarsson |first17=Rafn |last18=Benediktsdottir |first18=Kristrun R |last19=Aben |first19=Katja K |last20=Kiemeney |first20=Lambertus A |last21=Olafsson |first21=Jon H |last22=Gulcher |first22=Jeffrey |last23=Kong |first23=Augie |last24=Thorsteinsdottir |first24=Unnur |last25=Stefansson |first25=Kari |s2cid=19313549 |display-authors=8 }}</ref> The majority of people in the world overall have dark brown eyes. Brown irises range from highly pigmented, dark brown (almost black) eyes, to very light, almost amber or hazel irises composed partially of [[lipochrome]]. of Light or medium-pigmented brown eyes are common in [[Europe]], [[Afghanistan]], [[Pakistan]] and [[North India|Northern India]], as well as some parts of the [[Middle East]], and can also be found in populations in [[East Asia]] and [[Southeast Asia]], but are proportionally rare. (See [[eye color]]).
<gallery mode="packed" heights="100">
File:Epicanthic KR03.jpg|A dark brown iris is most common in [[East Asia]], [[Southeast Asia]], and [[South Asia]]
File:Picture of brown eyes.jpg|Medium brown iris
File:Human eye with limbal ring, anterior view.jpg|Light brown irises can also be found in [[East Asia]] and [[Southeast Asia]], but are relatively rare
File:Hazel eyes S7307583.jpg|A light brown iris is most common in [[North Africa]], [[Eastern Europe]], the [[Americas]] and [[West Asia]] 
</gallery>