Color values of existing objects change when images are placed by drag & drop
A bug report was received on the Japan Forum stating that when an image with a color profile embedded that differs from Illustrator's color settings is placed by drag-and-drop, the color values of existing objects are changed.
Here are the steps to reproduce the problem.
Save the image with Adobe RGB (1998) embedded as an example.
Specify sRGB in Illustrator's color settings and set a color management policy other than "None".
Under the above conditions, when an image file is dragged and dropped onto a document, the color values of the existing objects are changed.
This behavior may be a "bug" or a "specification" that needs to be discussed.
By undo and redo after placement, the color values of the group of objects returned to the values before placement.
Therefore, we can conclude that this is a bug.
Although the phenomenon was reported in the latest version 2022 (26.0.3), it seems to be a bug that has existed for a long time.
We will make every effort to alert the community to this issue, but we are requesting that the specification be improved.
----Japanese / にほんご ----
タイトル:カラープロファイルの一致しないファイルをドロップ配置すると既存オブジェクトのカラー値が変化する
Illustratorのカラー設定と異なるカラープロファイルが埋め込まれた画像をドラッグ&ドロップで配置したとき、既存のオブジェクトのカラー値が変化してしまう、という内容の不具合報告がジャパンフォーラムに寄せられました。
再現手順を示します。
・画像には一例としてAdobe RGB(1998)を埋め込んで保存
・Illustratorのカラー設定ではsRGBを指定、カラーマネジメントポリシーの項目は「なし」以外を指定
以上の条件下で、ドキュメント上に画像ファイルをドラッグ&ドロップにて配置すると、元からあるオブジェクト群のカラー値に変化が発生します。RGB、CMYKを問わず発生するようです。
この挙動について「不具合」か「仕様」か審議を要するところですが、
配置後に、取り消し、やり直し を行うことで、オブジェクト群のカラー値は配置する以前の値に戻りました。
よって、バグと断定できます。
現象の報告は現在の最新バージョンである2022(26.0.3)で確認されましたが、有志で検証したところ、ずっと以前から存在しているバグのようです。
コミュニティでの注意喚起に努めますが、仕様の改善を求めるものであります。
It is reported the problem still happens on Macs, but is probably never happens on Windows.
To trigger the change, one can just the Preview mode.
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Ton commented
Drag & Drop (if you can) still can modify the Document color profile in this beta.
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aka ak commented
データの色が勝手に濃くなる
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Russ Gray commented
Hi Colm, if you're still having this problem, can I ask you .... do you happen to be taking screenshots, and placing them in your document? If so, are you grabbing the little "preview" screenshot that pops up in the bottom corner of your screen? If so, after months of trouble with this, I narrowed it down to this problem for myself. (I didn't see your post and made a new one here https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/45727408-screenshot-preview-placement-in-illustrator-mac-o ) I'm hoping somebody there will become aware of this, because I've tested it with other co-workers, it's easily replicable.
If you place the screenthots NOT using the preview (ie, dragging from the finder, or File > place), the problem does not arise for me.
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Lance commented
I am able to replicate this behavior:
1. Illustrator document in RGB mode, assign profile as sRGB (working space is AdobeRGB) drag+drop or copy+paste a jpg that is AdobeRGB, when prompted about the profile mis-match, whether to convert or not - select "convert". Note that this prompt only appears if you have the options set to warn of profile mismatches. See screenshot.
2. Any RGB colored object will have it's largest/highest channel value reduced by 1. Same for colors with two equal channels and one lesser channel, for example 155,155,20 becomes 154,154,20.
Note that if selecting "don't convert" at the prompt, the RGB color values of objects in the document do not change.
The only RGB colored objects whos values didn't change when selecting "convert" on the profile mismatch prompt were these of equal channel values:
100,100,100
107,107,107,
50,50,50Equal channel values that did change:
203,203,203
204,204,204
220,220,220
250,250,250My testing is obviously not exhaustive - I cannot possibly test every combination of channel values.
I also did not test an AdobeRGB document and drag+drop sRGB file, but I did test CMYK color modes and the same kind of thing happens there as well, but the changes to the channels seem to be more evenly distributed to each channel - not just the channel(s) with the highest value.
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ajabon grinsmith commented
I forgot to add a link to the thread in question in the community.
当該コミュニティのリンクを付け忘れていました。 -
Colm O'Connor commented
Hi,
My RGB colour settings keep changing back to display. I have the original file set up as sRGB IEC61966-2.1 and when I copy and past anything in I get a warning if there are any colour mismatch issues. If there are any issues I click assign working profile. When I close and reopen that file it has now changed to Display.
I'm using
macOS Catalina Version 10.15.17
Illustrator Version 25I'm work on branding projects so it's important that colors are consistent. How do I get illustrator to stop changing my color profiles?