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Participant
October 12, 2021
Question

colour harmony service

  • October 12, 2021
  • 2 replies
  • 3120 views

Hi! My name is Egor and I'm a CG-Artist
And I'm interested in a strange question
adobi has a colour harmony service
https://color.adobe.com/ru/create/color-wheel
and it uses a strange colour wheel, different from the colour wheel in photoshop.
It has a green colour opposite red.
Selecting Hue 180 degrees I should be exactly opposite red (as red Hue is 0 or 360 degrees) and should see green, but I get thrown to cyan...and it's clearly not a 180 degree circle.
I assumed the Adobw RGB 1998 profile was used for the colour wheel
and I'm wondering why it's done that way, as it causes the harmonies and triads to shift.
Or is it done deliberately, but for what purpose?
I'd be happy to hear from you, thank you!

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    2 replies

    Participant
    April 15, 2022
    quote

    Hi! My name is Egor and I'm a CG-Artist
    And I'm interested in a strange question
    adobi has a colour harmony service
    https://color.adobe.com/ru/create/color-wheel/ 
    and it uses a strange colour wheel, different from the colour wheel in photoshop.
    It has a green colour opposite red.
    Selecting Hue 180 degrees I should be exactly opposite red (as red Hue is 0 or 360 degrees) and should see green, but I get thrown to cyan...and it's clearly not a 180 degree circle.
    I assumed the Adobw RGB 1998 profile was used for the colour wheel
    and I'm wondering why it's done that way, as it causes the harmonies and triads to shift.
    Or is it done deliberately, but for what purpose?
    I'd be happy to hear from you, thank you!


    By @Егор5E43

    Apparently, this is due to the accidental rotation of the color wheel. There is no logic to the choice of gamma.

    rob day
    Community Expert
    Community Expert
    October 12, 2021

    Photoshop’s General Preferences let you change the default Adobe Color Picker to Apple’s Color Picker, which is a wheel. The Adobe Color Picker is not a wheel—it lets you set different space views. Here my active document has sRGB assigned and the 180|83|100 HSB value in the picker matches in appearance to the same value in your capture.

     

     

     

     

    Adobe Color is web based, so the interface color appearance and listed RGB values are always sRGB, if you want to color manage themes there is the option to set the Color Mode to Lab, and from there you can save your theme to a CC Library, and make color managed conversions to any RGB or CMYK space using Phoroshop or one of the Adobe print apps.

     

     

     

     

     

    Participant
    October 18, 2021

    Thanks for the reply! Yes, I understand that.
    But I'm interested in another question (I probably phrased it wrong).
    Why are the different colour circles so different. What does the colour distribution in this gradient depend on?
    Maybe there is some literature or topics I should study
    Thank you!

     

    ?

    rob day
    Community Expert
    Community Expert
    October 18, 2021

    Looks like it might be as simple as the AdobeColor UI designer has the color wheel randomly rotated, you could try filing a bug report. The web color wheel is an HTML5 canvas object and HTML is normally displayed as sRGB by all of the major web browsers.