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Finding nearest color in RGB?


Generate distinctly different RGB colors in graphsHow can I color Python logging output?Formula to determine brightness of RGB colorFinding nearest RGB colourCalculation of a mixed color in RGBHow to get different colored lines for different plots in a single figure?Understanding colors on Android (six characters)Programmatically Lighten or Darken a hex color (or rgb, and blend colors)RGB to Hex and Hex to RGBHex transparency in colors






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I have to find the nearest color. For example, I have two colors colorA1, colorA2 which are nearly same color. And also I have other color colorB1.
And I need such a method:
Color getNearestColor(colorA1, colorA2, colorB1). This method should give me the colorB2 which is calculated by using the difference of colorA1 and colorA2, then using their distance it should give me colorB2 which has the same distance as in colorA1 and colorA2.
Can you give some ideas how to implement it?










share|improve this question






























    0















    I have to find the nearest color. For example, I have two colors colorA1, colorA2 which are nearly same color. And also I have other color colorB1.
    And I need such a method:
    Color getNearestColor(colorA1, colorA2, colorB1). This method should give me the colorB2 which is calculated by using the difference of colorA1 and colorA2, then using their distance it should give me colorB2 which has the same distance as in colorA1 and colorA2.
    Can you give some ideas how to implement it?










    share|improve this question


























      0












      0








      0








      I have to find the nearest color. For example, I have two colors colorA1, colorA2 which are nearly same color. And also I have other color colorB1.
      And I need such a method:
      Color getNearestColor(colorA1, colorA2, colorB1). This method should give me the colorB2 which is calculated by using the difference of colorA1 and colorA2, then using their distance it should give me colorB2 which has the same distance as in colorA1 and colorA2.
      Can you give some ideas how to implement it?










      share|improve this question














      I have to find the nearest color. For example, I have two colors colorA1, colorA2 which are nearly same color. And also I have other color colorB1.
      And I need such a method:
      Color getNearestColor(colorA1, colorA2, colorB1). This method should give me the colorB2 which is calculated by using the difference of colorA1 and colorA2, then using their distance it should give me colorB2 which has the same distance as in colorA1 and colorA2.
      Can you give some ideas how to implement it?







      colors rgb






      share|improve this question













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      asked Mar 27 at 6:55









      Iriskul TurduevIriskul Turduev

      768 bronze badges




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          To find the nearest colour, you need a definition of "near", so a metric.



          In Wikipedia you will find different metrics of color differences.



          Personally I would use the 2*R*R + 4*G*G + 3*B*B. (no need for square roots, you will just compare same metrics). Easy to calculate, you can use just integers (if you use 32 bit integers, you will have no overflow).



          Then find which colour has the smallest differences between your target colour.



          The other methods are more precise, but in that case "RGB" is not enough. You need to know which colour space are using (probably you are in sRGB).






          share|improve this answer
























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            To find the nearest colour, you need a definition of "near", so a metric.



            In Wikipedia you will find different metrics of color differences.



            Personally I would use the 2*R*R + 4*G*G + 3*B*B. (no need for square roots, you will just compare same metrics). Easy to calculate, you can use just integers (if you use 32 bit integers, you will have no overflow).



            Then find which colour has the smallest differences between your target colour.



            The other methods are more precise, but in that case "RGB" is not enough. You need to know which colour space are using (probably you are in sRGB).






            share|improve this answer





























              1














              To find the nearest colour, you need a definition of "near", so a metric.



              In Wikipedia you will find different metrics of color differences.



              Personally I would use the 2*R*R + 4*G*G + 3*B*B. (no need for square roots, you will just compare same metrics). Easy to calculate, you can use just integers (if you use 32 bit integers, you will have no overflow).



              Then find which colour has the smallest differences between your target colour.



              The other methods are more precise, but in that case "RGB" is not enough. You need to know which colour space are using (probably you are in sRGB).






              share|improve this answer



























                1












                1








                1







                To find the nearest colour, you need a definition of "near", so a metric.



                In Wikipedia you will find different metrics of color differences.



                Personally I would use the 2*R*R + 4*G*G + 3*B*B. (no need for square roots, you will just compare same metrics). Easy to calculate, you can use just integers (if you use 32 bit integers, you will have no overflow).



                Then find which colour has the smallest differences between your target colour.



                The other methods are more precise, but in that case "RGB" is not enough. You need to know which colour space are using (probably you are in sRGB).






                share|improve this answer













                To find the nearest colour, you need a definition of "near", so a metric.



                In Wikipedia you will find different metrics of color differences.



                Personally I would use the 2*R*R + 4*G*G + 3*B*B. (no need for square roots, you will just compare same metrics). Easy to calculate, you can use just integers (if you use 32 bit integers, you will have no overflow).



                Then find which colour has the smallest differences between your target colour.



                The other methods are more precise, but in that case "RGB" is not enough. You need to know which colour space are using (probably you are in sRGB).







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Mar 28 at 11:55









                Giacomo CatenazziGiacomo Catenazzi

                2,7171 gold badge9 silver badges18 bronze badges




                2,7171 gold badge9 silver badges18 bronze badges





















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