I've wondered if this existed and I just couldn't figure out how to access it because it seems like something that is so practical and useful that it MUST exist, but it looks like that is not the case.
Adobe, how have you developed so many useless features on your applications and haven't yet added a feature that should have existed since the inception of Illustrator?

This seems like a simple and obvious tool to have in Illustrator. There are tons of places where it would be useful, but just in case the developers don't understand why this should have been implemented years ago:

If I want to make a drop shadow and have it match an existing color in the document, if you open up the color too in the Drop Shadow dialog there is NO option to select a color from the document. No eyedropper.

Options are:

Have had added the color as a swatch beforehand and then pick it from there
Copy and paste the color info (hex maybe) from an eyedropper sampled color outside of the dialogue and then go back into the dialogue and paste it.

Your software always feels stuck in the year 2005. This is just another example.

Additionally, Photoshop has an eyedropper as part of the Color picker. And then Color picker on XD feels the most modern as it lets you sample anything on your screen.

Anyway, please update this feature, and all of the rest of the antiquated features on this dusty piece of software.

Wow, would't that be great!

I really need this.

I support this 100%.

I support this 100%. There must be at least half a dozen different color picker tools in Adobe Illustrator, and they all have inconsistent features.

Some have an eye dropper, some don't.

Some let you enter hex, some don't.

Some use the Photoshop-style color wheel, some don't.

This would be a great feature to add.

Yes, please!

Just posted this in a specific eyedropper request (https://illustrator.uservoice.com/forums/333657-illustrator-feature-requests/suggestions/38115490-eyedropper-tool-usable-during-color-picker) but this one has more support so will add here as well.

When re-writing the code for the eyedropper please look to make it available for selection from within the colour panel (it's already there on the gradient panel), and also the pop up dialog when creating a colour swatch. The reason for the later is so that it is easy to edit a swatch that is already in use in an existing file and replace the colour with something else sampled from elsewhere on the screen, be that inside the Illustrator app, or otherwise.

Agreed!

I'm in the middle of updating a tonne of assets as the company has gone through a rebrand exercise with an entirely different colour palette. My new colours are available to me via CC Libraries, it would streamline the process if when double-clicking on a swatch, I could then sample from the updated library palette to automatically apply the changes to the corresponding artwork by updating the respective swatches.

PLEASE DO IT

Color Picker in Illustrator is a nightmare. The whole swatch system is 1990s. When will you guys finally give us a 21century color system we can work with. I agree with previous comments, taking screenshots just to get colors is pathetic. Why can't we FINALLY get a color picker that grabs a color from anywhere? From gradients, swatches, even from other apps. If I have photoshop open and illustrator, I want to be able to grab a color through the picker from the other apps as well. Your current concepts of swatch and cloud library is totally counter intuitive and slows down my work flow immensly. It's way to slow and chaotic. If I can take a sreenshot from any image on my screen and grab color from that, why can't you dev people just implement that by design and finally make our lives in Illustrator a little more easier. I am really disappointed on how backward and unflexible Adobe has become. Where is the innovation? Designers use colors every day, every hour and every minute in the design process. Focus on the essentials first. Thank you. [rant end].

Eyedropper tool should be usable while the color picker is open. This is available in Photoshop but inexplicable absent from AI.

This would help so much

"Under review" since October 2017. Embarrassing.

yes ,I would like the color picker box to be hanging anywhere while I scan still picker color from my canvas.

Yes! How can devs ignore something like that??? Right now I'm using Snipping Tool to do cropped screenshots of my work, pasting it to my Ai canvas so I can easily pick colors for my vectors. Ridiculous!

Another sign of who actually uses Adobe's software and who is just developing it blindfolded...

Would be better if you could eyedrop from anywhere on any screen (eg: from an internet browser window).

Cinema4D eyedropper allows this.

This would make my work so much better and easier. I love the way it works in After Effects

Yes please.

Yes, please!
Improve the color picker from the gradient tool.
Also, insert a radial color palette and allow us to use the picker to get colors to insert into the gradient.
I have to admit the current color picker from Illustrator is far the worst tool I ever see.
Obviously was not made by a designer or someone who knows about design or by some one that uses the own Illustrator.
The way the current tools works is absolutely terrible!