How do I disable Dock and Panel transparency?

Question

See the image below. The transparency is a bit much, and makes it difficult to see the Panel icons. How do I disable it?

I'm using Ubuntu 17.10.

Solution

To force Ubuntu Dock to assume a fixed opacity, open Terminal and run

gsettings set org.gnome.shell.extensions.dash-to-dock transparency-mode 'FIXED'

Also you can change max-alpha and min-alpha (0 is completely transparent, 1 is completely opaque) of Ubuntu Dock following this:
How to make Ubuntu Dock fully opaque (black, like the top bar) when apps are touching it/fullscreen?

---

Getting rid of top-bar transparency is a bit tricky. You may use "Dynamic Panel Transparency" extension from here.

Once installed reload the page, a settings icon should appear. Click on it, a dialogue should pop up. Go to Background tab, toggle on "Enable custom opacity" and set "Unmaximized opacity" to a very high value, say 100%.

Then log out and log in again.

Alternatively you may try a different shell theme without a transparent top bar.

Comments

[Alexis Wilke]

Is there any GUI that one could use to tweak gsettings?

[pomsky]

@alexis You may use dconf-editor.