CoolNight Theme Collection¶

The CoolNight Collection is a set of 21 parametrically generated themes that provide consistent, professional color schemes optimized for extended development sessions.

Overview¶

CoolNight themes are designed with:

Reduced eye strain - Carefully calibrated contrast ratios
Consistent syntax highlighting - Uniform color semantics across themes
Professional appearance - Suitable for presentations and screen sharing
Parametric generation - Mathematically derived color relationships
Wide variety - 21 variants covering all color preferences

Theme Philosophy¶

Color Science¶

CoolNight themes use: - HSL color space for predictable hue relationships - Consistent lightness across variants for uniform readability - Optimal contrast ratios meeting WCAG accessibility standards - Semantic color mapping - similar code elements use related colors

Design Principles¶

Hierarchy - Different code elements have clear visual importance
Harmony - All colors work together aesthetically
Function - Colors convey meaning (errors=red, strings=green, etc.)
Consistency - Same color rules across all 21 variants

Complete Collection¶

Blue Family (Ocean Tones)¶

Theme	Hue	Character	Best For
`coolnight-arctic`	190°	Ice blue, crisp and clean	TypeScript, Go, documentation
`coolnight-ocean`	210°	Deep blue, default variant	General development, Python
`coolnight-midnight`	240°	Dark blue, intense focus	Late-night coding, C++

Preview:

nvp theme use coolnight-ocean
nvp theme use coolnight-arctic
nvp theme use coolnight-midnight

Purple Family (Creative Tones)¶

Theme	Hue	Character	Best For
`coolnight-violet`	270°	Soft violet, gentle on eyes	Web development, CSS
`coolnight-synthwave`	280°	Neon purple, retro vibes	JavaScript, creative coding
`coolnight-grape`	290°	Rich grape, sophisticated	Rust, systems programming

Preview:

nvp theme use coolnight-synthwave
nvp theme use coolnight-violet  
nvp theme use coolnight-grape

Green Family (Natural Tones)¶

Theme	Hue	Character	Best For
`coolnight-forest`	110°	Forest green, earthy	Bash scripts, DevOps
`coolnight-matrix`	120°	Matrix green, high contrast	Terminal work, cybersec
`coolnight-mint`	150°	Fresh mint, modern	React, Vue.js, modern JS

Preview:

nvp theme use coolnight-matrix
nvp theme use coolnight-forest
nvp theme use coolnight-mint

Warm Family (Energy Tones)¶

Theme	Hue	Character	Best For
`coolnight-ember`	20°	Glowing ember, energetic	Java, Spring Boot
`coolnight-sunset`	30°	Warm orange, inviting	HTML, markup languages
`coolnight-gold`	45°	Golden yellow, premium	Configuration files, YAML

Preview:

nvp theme use coolnight-sunset
nvp theme use coolnight-ember
nvp theme use coolnight-gold

Red/Pink Family (Passionate Tones)¶

Theme	Hue	Character	Best For
`coolnight-crimson`	0°	Deep crimson, bold	Error handling, debugging
`coolnight-sakura`	320°	Cherry blossom, elegant	Design systems, Figma
`coolnight-rose`	350°	Rose pink, romantic	Personal projects, blogs

Preview:

nvp theme use coolnight-rose
nvp theme use coolnight-crimson
nvp theme use coolnight-sakura

Monochrome Family (Focus Tones)¶

Theme	Character	Best For
`coolnight-mono-charcoal`	Charcoal gray, minimalist	Distraction-free coding
`coolnight-mono-slate`	Slate gray, professional	Enterprise development
`coolnight-mono-warm`	Warm gray, comfortable	Long coding sessions

Preview:

nvp theme use coolnight-mono-slate
nvp theme use coolnight-mono-charcoal
nvp theme use coolnight-mono-warm

Special Variants (Inspired Themes)¶

Theme	Inspiration	Character	Best For
`coolnight-nord`	Nord theme	Arctic blue-gray	Clean, Nordic aesthetic
`coolnight-dracula`	Dracula theme	Rich purple	Dark, gothic feel
`coolnight-solarized`	Solarized theme	Scientific precision	Academic, research

Preview:

nvp theme use coolnight-nord
nvp theme use coolnight-dracula  
nvp theme use coolnight-solarized

Parametric Generator¶

Create Custom Variants¶

Generate your own CoolNight variant using a hue angle (0–360), a hex color, or a preset name:

# Create by hue angle
nvp theme create --from "75" --name coolnight-lime     # Lime green
nvp theme create --from "165" --name coolnight-teal    # Teal blue
nvp theme create --from "315" --name coolnight-magenta # Hot magenta

# Create from a hex color
nvp theme create --from "#8B00FF" --name coolnight-violet

# Create from a preset name
nvp theme create --from "synthwave" --name my-synth

# Use immediately after creation
nvp theme use coolnight-lime

Hue Reference¶

Hue Range	Color Family	Examples
0° - 30°	Red to Orange	crimson, ember, sunset
30° - 90°	Orange to Yellow	gold, warm yellows
90° - 150°	Yellow to Green	forest, matrix, mint
150° - 210°	Green to Blue	teal, arctic, ocean
210° - 270°	Blue to Purple	midnight, violet
270° - 330°	Purple to Pink	synthwave, grape, sakura
330° - 360°	Pink to Red	rose, back to crimson

Advanced Generator Options¶

The --from flag accepts a hue angle, hex color, or preset name. For full control, create a theme YAML and apply it:

# Use a specific hue angle
nvp theme create --from "210" --name my-ocean

# Use a hex color as the base
nvp theme create --from "#0a7fa8" --name my-teal

# Use a built-in preset name
nvp theme create --from "ocean" --name ocean-custom

# Activate immediately after creation
nvp theme create --from "280" --name custom-purple --use

Color Palette Structure¶

Semantic Color Mapping¶

Every CoolNight theme uses this consistent mapping:

Semantic Role	Purpose	Example Elements
`bg`	Background	Editor background, panels
`fg`	Foreground	Default text, variables
`accent`	Primary accent	Cursor, selection, highlights
`comment`	Comments	`// comments`, `# comments`
`keyword`	Language keywords	`function`, `class`, `if`, `while`
`string`	String literals	`"hello"`, `'world'`
`function`	Function names	`myFunction()`, method calls
`type`	Type annotations	`String`, `int`, class names
`constant`	Constants	`true`, `false`, `null`, numbers
`error`	Error indicators	Error squiggles, diagnostics
`warning`	Warning indicators	Warning messages
`info`	Information	Hints, info messages
`selection`	Text selection	Selected text background
`border`	UI borders	Window borders, splits

Color Relationships¶

The parametric generator maintains these relationships:

Accent color derived from primary hue
Syntax colors are hue variations (±30°, ±60°, etc.)
UI colors use desaturated versions of the primary hue
Semantic colors (error, warning) use appropriate hues regardless of theme

Usage Recommendations¶

By Development Environment¶

Terminal-heavy workflows: - coolnight-matrix - High contrast green - coolnight-mono-charcoal - Minimal distractions

Web development: - coolnight-mint - Modern, fresh feel - coolnight-synthwave - Creative, vibrant

Systems programming: - coolnight-midnight - Deep focus - coolnight-grape - Sophisticated, serious

Documentation writing: - coolnight-arctic - Clean, readable - coolnight-mono-warm - Easy on eyes

Presentations/screen sharing: - coolnight-ocean - Professional default - coolnight-sunset - Warm, welcoming

By Time of Day¶

Morning coding: - coolnight-arctic - Fresh, energizing - coolnight-mint - Bright start

Daytime work: - coolnight-ocean - Balanced, professional - coolnight-forest - Natural, comfortable

Evening sessions: - coolnight-sunset - Warm transition - coolnight-ember - Cozy coding

Late-night coding: - coolnight-midnight - Deep focus - coolnight-mono-slate - Reduced stimulation

Integration Examples¶

With Theme Hierarchy¶

# Set different CoolNight variants by context
dvm set theme coolnight-ocean --ecosystem corporate      # Professional default
dvm set theme coolnight-matrix --domain security        # High contrast for security work
dvm set theme coolnight-synthwave --app creative-tool   # Creative project gets creative theme

With Development Workflow¶

# Different themes for different branches
git checkout main && dvm set theme coolnight-ocean
git checkout feature/ui && dvm set theme coolnight-mint  
git checkout hotfix/critical && dvm set theme coolnight-crimson

Export for Team¶

# Export your favorite CoolNight variant
dvm get nvim theme coolnight-synthwave -o yaml > team-theme.yaml

# Team members apply it
dvm apply -f team-theme.yaml

Technical Details¶

Color Space¶

CoolNight uses HSL (Hue, Saturation, Lightness) color space: - Hue: 0-360° (color wheel position)
- Saturation: 40-70% (balanced vibrancy) - Lightness: 45-85% (optimal contrast)

Accessibility¶

All CoolNight themes meet: - WCAG AA contrast ratios (4.5:1 minimum) - Colorblind friendly - not relying solely on color - Reduced motion - subtle animations only

Performance¶

CSS custom properties for easy browser integration
Terminal color mapping for consistent terminal themes
Fast switching - themes cached for instant preview

Troubleshooting¶

Theme Not Applying¶

# Check if theme exists
nvp theme list | grep coolnight-ocean

# Verify theme content
nvp theme get coolnight-ocean -o yaml

# Regenerate configuration
nvp generate

Colors Look Wrong¶

# Check terminal color support
echo $COLORTERM  # Should show: truecolor

# Check Neovim termguicolors
nvim -c 'set termguicolors?' -c 'q'

# Preview the theme to verify colors in terminal
nvp theme preview coolnight-ocean

Custom Variant Issues¶

# Check what was generated
nvp theme get my-custom-theme -o yaml

# Regenerate Lua files after making changes
nvp generate

Next Steps¶

Theme Hierarchy - Cascade themes through your organization
Theme IaC - Infrastructure as Code for themes
All Themes - Complete theme documentation
WezTerm Integration - Terminal theme integration