When comparing Two-firewatch vs Material Theme, the Slant community recommends Material Theme for most people. In the question“What are the best color themes for text editors?” Material Theme is ranked 17th while Two-firewatch is ranked 26th. The most important reason people chose Material Theme is:
The theme cleans up the interface so that all elements in the UI are easier to find without being distracting. The icons for each file type clearly define what the file is so there's no having to look too closely at file extensions. The color scheme choices (such as Oceanic Next Dark) in particular work well to distinguish functions, classes, keywords, properties, values, etc. for various languages.
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Pros
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
Pro Improves Sublime Text's user interface
The theme cleans up the interface so that all elements in the UI are easier to find without being distracting. The icons for each file type clearly define what the file is so there's no having to look too closely at file extensions.
The color scheme choices (such as Oceanic Next Dark) in particular work well to distinguish functions, classes, keywords, properties, values, etc. for various languages.
Pro Visually appealing
Pro Full language support
Cons
Con No contrast between main view and panels
Makes it hard to distinguish what's what at a glance.
Con Developer pushes versions too often
Very little meat in each version. Has been known to dramatically change the color scheme.