How to have a "live preview" when changing colors in Illustrator?
I'm a bit used to Photoshop and I just started to learn Illustrator but there's a little thing that's really bothering me.
In Photoshop when you are changing a color you can see it previewed on the object as you're selecting. It helps a lot with choosing the right color. See the following GIF to understand what I mean
But in Illustrator you have to "apply" the color every time you want to try a slight change. That's very frustrating.
How can I change it to have a "live preview" when changing colors in Illustrator like in Photoshop?
Use the Color Panel not the Color Picker.
The color picker is not as directly integrated into the Illustrator UI the way it is in Photoshop. You can easily change all colors using the Color Panel. There's really little need to use the Color Picker in Illustrator.