I am new to Illustrator. I am just finding this color panel really hard to use. How do you pick a gray color from that spectrum. Before Illustrator, I used Coreldraw a lot, where there is no spectrum but easy to use color well (or color picker!) in which you can easily choose colors. I just hate the spectrum view, is there any way to replace it with color picker?
Well. Corel Draw indeed has a lot of color representations models. They have RGB cube, CMY Cube, HSB, Tone...
And I agree that that particular one you are showing has no sense and it is useless, and as far as I know, there is no way to change it. Just play with the sliders or use the Internal color picker. :o(
It isn't really an extra click. You anyhow need to double-click on the color to enter the color picker.
Or you can just press F6 which will open the Color Panel
Now click anywhere on that "spectrum" to pick the color you want.