When comparing Leuven vs Two-firewatch, the Slant community recommends Leuven for most people. In the question“What are the best color themes for text editors?” Leuven is ranked 22nd while Two-firewatch is ranked 26th. The most important reason people chose Leuven is:
People with astigmatism prefer the bright white background since the extra light causes your pupils to contract, which makes your focus sharper.
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Pros
Pro Helpful for people with astigmatism
People with astigmatism prefer the bright white background since the extra light causes your pupils to contract, which makes your focus sharper.
Pro Helpful for people with deuteranomaly
Leuven is a high-contrast theme preferring blue hues to red ones which makes it easier for people with deuteranomaly (most common form of red-green blindness) to distinguish different syntactical elements.
Pro True color support for vim
Usually vim color schemes were limited to 256 colors. It is not the case anymore, with the right setup (latest vim versions and neovim) terminal vim can display as many colors as GUI vim.
Pro Easy on the eye
Pro Light and dark
Cons
Con May cause eye strain
People with blue-light sensitivity may prefer a dark theme.