When comparing OneStepBack vs Zukiwi, the Slant community recommends OneStepBack for most people. In the question“What are the best gtk3 themes?” OneStepBack is ranked 7th while Zukiwi is ranked 27th. The most important reason people chose OneStepBack is:
The color combination has been carefully engineered exactly for the purpose of making people comfortable, while staring at the monitor for a prolonged period of time.
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Pros
Pro Easy on the eyes
The color combination has been carefully engineered exactly for the purpose of making people comfortable, while staring at the monitor for a prolonged period of time.
Pro Allows you to focus on what's needed
The design is extremely basic - using just 1 color accompanied by 3 shades of grey, OneStepBack manages to be a very functional theme without adding any flashy.
Pro Offers PPA for easy install on Ubuntu based distros
Zukiwi offers an Ubuntu PPA for Ubuntu based distros.
sudo add-apt-repository ppa:noobslab/themes
sudo apt-get update
sudo apt-get install zukiwi
Pro Has matching GTK theme
Zukitwo Gnome Shell theme offers a matching GTK theme.
Cons
Con Looks old and dated
it's not flat
Con Funky arrow button colors in FireFox
The developer is currently aware of this issue, however the fix can't be made until FireFox has an update.
Con Only supports latest release of Gnome Shell and GTK
Zukiwi only supports the latest release of Gnome Shell and GTK.