Still happening, also when dragging an image with a different profile from Photoshop into Illustrator.
So the title does not cover all problems, not only a screendump, but also Photoshop files can change the Illustrator Document Color Profile.

Got it! Thanks so much for merging!

Ah, yes, I get it now very clearly, thank you. The profile of the document changes, not the color mode.
A known behavior :( There should be an existing report about it.
I am fixing the title and going to merge it when I locate a previous report.
Again — thank you!

Hi Egor,

Thanks so much for your response.

I recorded a video—hope that it shows what I meant to report.

Let me know if you have any questions.

Thank you for taking a look at this.

Warmly,
Saskia

Don’t get it, sorry.
Perhaps terms are confused? Document Color Mode can be either CMYK Color or RGB Color — what’s 'Display Color Mode'?
Or do you refer to Color Settings Profiles?

Can you please record this on video?

Document Color Profile changes after dropping screenshot into file (to Display Color from sRGB).
MacOS.

See also:
https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/44596797-illustrator-will-automatically-convert-color-codes

Drag & Drop (if you can) still can modify the Document color profile in this beta.

Can we fix the strange discarding of the color profile when dragging a screenshot thumbnail into an open Illustrator document (Mas OS — Command+shift+4, or Command+shift+3, or Command+shift+5). The thumbnail appears in the corner of the screen prior to the screenshot being saved to the Desktop.

Using File>Place, or copying/pasting from any other program, or even dragging and dropping a screenshot from the desktop or other folder all cue a warning if there is a profile mismatch. And to my experience, placing in any of those ways does not change the document profile, regardless of what I choose when the warning comes up.

However: dragging and dropping a screenshot thumbnail preview cues no warning at all, and Illustrator silently discards the colour profile. When working on branding and website design users need to pull in screenshots without losing their brand colours. I have to save two documents all the time as a precaution as this happens in most of my illustrator files. Despite brining in screenshots other ways. Please resolve its been years of pain!!!

Dragging an image from Photoshop with a different profile than the Illustrator Document Color Profile into an Illustrator document will change the color profile of the document into that of the image.
No warnings given even if the Color Settings are set up to warn.
See this forum topic:
https://community.adobe.com/t5/illustrator-discussions/color-damage-on-illustrator/m-p/14241325#M388060

データの色が勝手に濃くなる

I just updated this morning to 27.0. The problem persists. I suspect thousands of people are dealing with this every day, and like me for so long, don't even realize it's happening. This needs some attention!

Yes. I've made a new thread for this; I've been having this issue for months, but couldn't pinpoint why. I've probably had this issue for much longer and simply didn't notice before, based on how long ago you posted this. Same happens in CMYK. This issue does not happen when placing the same way into Photoshop.

I didn't see your thread before I started mine: https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/45727408-screenshot-preview-placement-in-illustrator-mac-o

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.

When taking a screenshot on a Mac (Big Sur, 11.7) a small preview of the screenshot appears in the bottom right corner of the screen. If you grab that preview before it disappears, you can place it in an email, chat app, or any other software that will accept it, including Illustrator and Photoshop. It's a nice little time-saver. However, when I grab that preview and place it in Illustrator, the document becomes either "Untagged CMYK" or "Display" (RGB) on its own. I didn't notice this for a very long time, but was constantly having color problems, only to find out my color mode had been changed without my knowledge to "Display" or "Untagged CMYK". Now I know what's causing it at least! I can work around this of course, but since probably many others are having this problem and don't even know it, I thought I'd pass this on.

Once the color profile is changed to "display" or "untagged CMYK" in this manner, no amount of "Command+Z" will bring back the colors you had OR change the color profile back to the original.

One note: if the screenshot preview is left alone, it disappears and then is saved on the hard drive as a PNG; whereas, if left so save to the hard drive, it is saved as a PNG. If the screenshot is placed conventionally (either dragging from the finder into a document, or via File > Place, this color space change doesn't seem to be an issue. It is ONLY when grabbing the preview to place the screenshot as far as I can tell.

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,
50,50,50

Equal channel values that did change:
203,203,203
204,204,204
220,220,220
250,250,250

My 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.

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。

https://community.adobe.com/t5/illustrator%E3%83%95%E3%82%A9%E3%83%BC%E3%83%A9%E3%83%A0-discussions/%E3%83%89%E3%82%AD%E3%83%A5%E3%83%A1%E3%83%B3%E3%83%88%E3%82%AB%E3%83%A9%E3%83%BC%E3%83%A2%E3%83%BC%E3%83%89rgb-%E3%81%A7%E4%BD%9C%E6%A5%AD%E4%B8%AD-%E6%8C%87%E5%AE%9A%E3%81%97%E3%81%9Frbg%E3%82%AB%E3%83%A9%E3%83%BC%E3%81%8C%E5%8B%9D%E6%89%8B%E3%81%AB%E5%BE%AE%E5%A6%99%E3%81%AB%E5%A4%89%E3%82%8F%E3%81%A3%E3%81%A6%E3%81%84%E3%81%8F/td-p/12763105

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。

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 25

I'm work on branding projects so it's important that colors are consistent. How do I get illustrator to stop changing my color profiles?