Block definition diagram in the Arc Dark Contrast (Material) theme
Block Definition Diagram in the Arc Dark Contrast (Material) theme
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Turn on dark theme (Material)

To apply a Material dark theme, go to [View] – [Look & Feel] – [Dark Themes (Material)] in the main menu and choose a theme. Material dark themes are available in:

  • Astah Professional, Astah UML and Astah Viewer version 9.0 and later
  • Astah SysML and Astah System Safety version 8.0 and later

Background of Diagram Editor

Themes do not change the background color of the Diagram Editor. To match it to a dark theme, change it here:

  • Astah Professional and Astah UML: [Tools] – [System Properties] – [Diagram Editor] – [Background color]
  • Astah SysML and Astah System Safety: [Tools] – [System Properties] – [Basic] – [Diagram Editor] – [Background color]
Background color setting of the Diagram Editor in the System Properties
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Pre-installed Themes

Astah comes with nearly 70 pre-installed themes. This page previews each Material dark theme; for our picks, see the 8 best themes we recommend.

To see all the available themes, pick a category:

  1. Light Themes
  2. Dark Themes
  3. Dark Themes (Material)
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Available Dark Themes (Material)

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Arc Dark (Material)

Astah in the Arc Dark (Material) dark theme

Arc Dark Contrast (Material)

Astah in the Arc Dark Contrast (Material) dark theme

Atom One Dark (Material)

Astah in the Atom One Dark (Material) dark theme

Atom One Dark Contrast (Material)

Astah in the Atom One Dark Contrast (Material) dark theme

Dracula (Material)

Astah in the Dracula (Material) dark theme

Dracula Contrast (Material)

Astah in the Dracula Contrast (Material) dark theme

GitHub Dark (Material)

Astah in the GitHub Dark (Material) dark theme

GitHub Dark Contrast (Material)

Astah in the GitHub Dark Contrast (Material) dark theme

Material Darker (Material)

Astah in the Material Darker (Material) dark theme

Material Darker Contrast (Material)

Astah in the Material Darker Contrast (Material) dark theme

Material Deep Ocean (Material)

Astah in the Material Deep Ocean (Material) dark theme

Material Deep Ocean Contrast (Material)

Astah in the Material Deep Ocean Contrast (Material) dark theme

Material Oceanic (Material)

Astah in the Material Oceanic (Material) dark theme

Material Oceanic Contrast (Material)

Astah in the Material Oceanic Contrast (Material) dark theme

Material Palenight (Material)

Astah in the Material Palenight (Material) dark theme

Material Palenight Contrast (Material)

Astah in the Material Palenight Contrast (Material) dark theme

Monokai Pro (Material)

Astah in the Monokai Pro (Material) dark theme

Monokai Pro Contrast (Material)

Astah in the Monokai Pro Contrast (Material) dark theme

Moonlight (Material)

Astah in the Moonlight (Material) dark theme

Moonlight Contrast (Material)

Astah in the Moonlight Contrast (Material) dark theme

Night Owl (Material)

Astah in the Night Owl (Material) dark theme

Night Owl Contrast (Material)

Astah in the Night Owl Contrast (Material) dark theme

Solarized Dark (Material)

Astah in the Solarized Dark (Material) dark theme

Solarized Dark Contrast (Material)

Astah in the Solarized Dark Contrast (Material) dark theme