Flatsonar

ColorSmith

by Keshav Bhatt

Professional color picker, gradient maker, and palette manager

Broad permissions Verified creator GPL-3.0+ v1.1.0
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About

ColorSmith is a professional color management suite designed for designers, developers, and digital artists. It delivers precision tools for color selection, accessibility testing, gradient creation, and palette management with an intuitive interface built for professional workflows.

Professional Features:

  • WCAG AA/AAA compliant contrast checker for accessible design
  • Visual HSL gradient sliders for intuitive color adjustments
  • Smart paste detection that automatically converts color codes between formats
  • Enhanced color preview with hover-to-enlarge functionality
  • Original color comparison to track color modifications
  • Context menu operations on palette swatches for streamlined workflow

Core Features:

  • Screen color picker to capture colors from anywhere on your display
  • Interactive HSV color plane with precision brightness adjustment slider
  • Support for multiple color formats: HEX, RGB, RGBA, HSL, HSLA, HSV, and CMYK
  • Transparency control with alpha channel support
  • Random color generator for creative inspiration
  • One-click color value copying to clipboard
  • Customizable resizable layout with persistent panel sizing

Gradient Generator:

  • Create linear and radial gradients with unlimited stops
  • Precise control over gradient angles (0-360°) and stop positions
  • Live preview with fullscreen mode support
  • Export as CSS code (with vendor prefixes and old WebKit syntax)
  • Export as SVG files or PNG images with custom dimensions
  • Random gradient generation
  • Screen color picker integration for gradient stops

Palette Management:

  • Create and manage multiple custom color palettes
  • Extract color palettes from images using K-means clustering
  • Import and export palettes in JSON format
  • Add optional names to palette colors for better organization
  • Built-in standard HTML colors palette
  • Quick add current color to any palette
  • Right-click context menu to copy or remove colors

Professional Workflow Tools:

  • Comprehensive keyboard shortcuts (Ctrl+K to view all shortcuts)
  • Persistent settings that remember window geometry, panel sizes, and last used color
  • Clean, modern Qt-based interface with streamlined toolbar
  • Quick access to project documentation and source code

Permissions

1 permission weaken the sandbox. Flatsonar asks before installing.

  • X11 display: X11 lets apps read input and windows of other apps
    --socket=x11
  • inter-process communication (needed for X11)
    --share=ipc
  • Wayland display
    --socket=wayland
  • X11 display, only when Wayland is unavailable
    --socket=fallback-x11
  • GPU acceleration
    --device=dri
  • access to xdg-config/kdeglobals
    --filesystem=xdg-config/kdeglobals:ro
  • talks to com.canonical.AppMenu.Registrar
    --talk-name=com.canonical.AppMenu.Registrar
  • talks to org.kde.kconfig.notify
    --talk-name=org.kde.kconfig.notify
  • talks to org.kde.KGlobalSettings
    --talk-name=org.kde.KGlobalSettings

Who publishes this

The creator demonstrably controls this app id: Flathub verification, the hosting account owns the namespace, or a well-known file on their domain.

  • verified on Flathub: the developer proved they control this app id
    publisher:flathub

Maintenance

Recent activity on the upstream repository, or built and reviewed by Flathub.

No staleness signals: recent activity, or built and reviewed by Flathub.