The " son in blue " areno longer just boys , but the color of their uniforms has stay consistent since the first modern police forces appear in the nineteenth century . In the U.S. , the UK , and other nation , copper can be identified by their dark US Navy clothing . Though the design does serve a real design , it was mainly chosen because it was what was available at the time .

According toPolice1 , blue police force uniforms originated in London . The London Metropolitan Police is turn over the first real police force , and when it was established in 1829 , officer were generate dark drear garment to wear . Because British soldiers were already wearing reddened and white during this era , blue was plunk to distinguish cops from the war machine .

The United States ' first prescribed police force was form in New York in 1845 , and blue uniforms in the style of London ’s bobbies soon became the standard . When cities like Boston , Philadelphia , and Detroit began employing constabulary policeman , they adopted blue uniform as well .

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In some grammatical case , American police units select the color for totally polar reasons than the UK . During the Civil War , blue Union Army outfits were easy to come by , and the extras often went to police forces that did n’t have official uniform yet . This is how theLos Angeles Police Departmentfirst began prune in naughty . After the war , the people of colour nonplus around .

Today , law officers wear blue for practical reasons . The dark navy color makes them harder to spot when cross down suspect at night . The color is also better at hiding smear than a lighter tad would be . Not all police uniform descend in the same color — some officers wearblack or dark fleeceable — but obscure blue angel is the shade mostly nearly associated with the professing .

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