Themes

hdds_viewer includes 8 built-in themes to match your preferences and accessibility needs.

Available Themes

Dark Pro (Default)

Professional dark theme optimized for long sessions. Low eye strain with carefully chosen contrast ratios.

Cyberpunk

Neon-inspired theme with vibrant colors. Magenta and cyan accents.

High Contrast

WCAG AAA compliant theme for maximum accessibility. 7:1+ contrast ratios throughout. High Contrast Theme

Recommended for:

Users with visual impairments
Bright ambient lighting conditions
Accessibility compliance requirements

Catppuccin Latte

Light variant of the popular Catppuccin palette. Warm, pastel colors.

Catppuccin Frappe

Catppuccin Macchiato

Catppuccin Mocha

Dark variant of Catppuccin. Rich, cozy dark theme.

Gruvbox Dark

Retro groove color scheme with earthy tones.

Switching Themes

Via Menu

1. Open View > Theme

2. Select desired theme from submenu

Via Settings

1. Open Settings panel (Ctrl+,)

2. Navigate to Appearance section

3. Select theme from dropdown

Via CLI

# Set theme via environment variable
HDDS_VIEWER_THEME=cyberpunk hdds-viewer

Or in config file ~/.config/hdds-viewer/config.toml
[appearance]
theme = "catppuccin-mocha"

Theme Persistence

Selected theme is saved to:

Linux: ~/.config/hdds-viewer/config.toml
macOS: ~/Library/Application Support/HDDS Viewer/config.toml
Windows: %APPDATA%\HDDS Viewer\config.toml

Accessibility Notes

Theme

WCAG Level

Best For

High Contrast	AAA	Visual impairments, bright lighting
Dark Pro	AA	General use, low light
Cyberpunk	A	Personal preference
Catppuccin variants	AA	Reduced eye strain
Gruvbox variants	AA	Long coding sessions

Custom Themes (Enterprise)

Enterprise users can define custom themes via TOML:

[theme.custom]
name = "Corporate Blue"
background = "#1a2744"
text = "#e5e9f0"
primary = "#0066cc"
secondary = "#4a90d9"
error = "#ff5555"
warning = "#f1c40f"
success = "#2ecc71"