Currently a work in progress.

Finished:

• enlighten.terminal - terminal.app profile

In Progress:

• A color scheme with multiple language & highlight group support - enlighten.vim
• Accessibility for users across all color scheme implementations.

Download enlighten.terminal and open it with Terminal.app to auto import.

curl -fLo ~/Downloads/enlighten.terminal \
  https://raw.githubusercontent.com/her/enlighten/master/enlighten.terminal

Research has shown that text is easier to read on a light background. Users make less mistakes and it's easier on the eyes. However, most themes for both terminal emulators and text editors across the internet cater towards light text on a dark background.

The goal of this project is to develop the world's most beautiful and legible light theme for every day use. It should be accessible to everyone, adaptable to the user, and available on as many platforms as possible. Color choices should be based on a model of readability, easy discernment, and wherever possible should use color theory and science to lead development decisions.

This project is in it's early stages and I wouldn't say that it currently lives up to the stated goals. Going forward changes and developments should seek to uphold the ideals of this project by following it's goals.

Regular	Bright
Black	Bright Black
Red	Bright Red
Green	Bright Green
Yellow	Bright Yellow
Blue	Bright Blue
Magenta	Bright Magenta
Cyan	Bright Cyan
White	Bright White

Minimum contrast ratio requirements for AA grade
Normal text - 4.5:1
Large text - 3:1

Minimum contrast ratio requirements for AAA grade
Normal text - 7:1
Large text - 4.5:1

✅ - Pass
❌ - Fail

Passing requirements for color and brightness:
Color Difference - Minimum 500
Brightness Difference - Minimum 125

👁 - Pass
⚠️ - Fail

Compared against a background color of #FFFFFF

Examle of accessible color meansurement values:

As a list:
AAA, 21:1, 765, 255

Black #000000 ✅ 👁
AAA, 21:1, 765, 255

Red #C30600 ✅ 👁
AA, 6.3:1, 564, 194

Green #007E00 ✅ 👁
AA, 5.3:1, 639, 182

Yellow #CD7F40 ❌ ⚠️
Fail, 3.1:1, 369, 112

Blue '#006A9D' ✅ 👁
AA, 5.9:1, 502, 175

Magenta #3C2DA2 ✅ ⚠️
AAA, 10.1:1, 498, 193

Cyan #306B6A ✅ 👁
AA, 6.1:1, 504, 166

White #A3AFB6 ❌ ⚠️
Fail, 2.2:1, 245, 83

Bright Black #666666 ✅ ⚠️
AA, 5.7:1, 459, 153

Bright Red #EC0000 ✅ 👁
AA, 4.6:1, 529, 185

Bright Green #008500 ✅ 👁
AA, 4.8:1, 632, 177

Bright Yellow #E9AD53 ❌ ⚠️
Fail, 2:1, 276, 75

Bright Blue #1761BE ✅ ⚠️
AA, 6:1, 455, 170

Bright Magenta #B20F4A ✅ ⚠️
AA, 6.9:1, 498, 185

Bright Cyan #276F6F ✅ 👁
AA, 5.9:1, 504, 166

Bright White #FFFFFF ❌ ⚠️
Fail, 1:1, 0, 0

AAA grade is given for passing all the above requirements.
AA grade will be given for passing Normal Text requirements.

⚠️ Careful consideration before use. Against another listed color this may be fine to use, but you should take into account the user.

Ruby, Python, Javascript, JSON, SQL, YAML, XML, HTML, CSS, Markdown, Shell, Vim's defaults (Language Constructs, Variable Types, C Family), netrw.

Will add other highlight groups once the above are completed. Possibly next being, Perl, php. Also am considering other add-on syntax groups like NGINX or Docker (which would require extending vim with a syntax library for these technologies).

:h group-name :h highlight-groups :h cterm-colors

:w :so %

:so $VIMRUNTIME/syntax/hitest.vim

• https://github.com/ThePacielloGroup/CCA-OSX

• https://github.com/nvkelso/color-oracle

https://colorusage.arc.nasa.gov/GuidelinesHierarchy.php