About this design
Where the Observatory style comes from, and what it signals.
Observatory takes its cue from eighteenth-century star atlases: a radial gradient sky shifting from deep blue-black #0B1426 at the center to near-void #050810 at the edges, scattered with about two dozen white dots between one and two pixels wide at varying opacities. The night sky is the grid, and data points are charted as stars.
Three typefaces divide the work: italic Cormorant Garamond for display headings in off-white #E8EDF7, Spectral for body text, and Space Mono in small uppercase for labels and metadata at the footer, set in muted blue #8A97B2 with wide letterspacing. Gold #E3C77B belongs to the key data point only: a 5px star with a soft glow and a thin ring, the one element that earns full opacity in a slide built from semi-transparencies.
The theme suits any subject that benefits from scale and contemplation: research results, long-range forecasts, scientific overviews. Keeping the constellation lines at 40 percent opacity and the dashed orbit arcs below 20 percent ensures the visual field stays quiet enough that one highlighted data point reads across the room.
Use it for
- Academic and scientific research presentations
- Long-range strategy or forecast decks
- Astronomy, physics and data-science talks
- Annual reports that need atmosphere rather than flash
Skip it for
- Weekly ops reviews where quick scanning matters more than atmosphere
- Bright-room conference presentations: the dark background needs a dim space to read well
The slide design prompt
This is the exact text that gets sent to your AI.
Design slides as a night-sky star atlas, the 'Observatory' theme. Background: a radial gradient from deep blue-black #0B1426 at upper center to #050810 at the edges, scattered with about 24 tiny white star dots of 1 to 2px at opacities between 0.25 and 0.6. Typography: italic 'Cormorant Garamond' display headings in #E8EDF7; body text in 'Spectral'; small uppercase 'Space Mono' labels with wide letterspacing in muted blue #8A97B2 (all three are Google Fonts); accents in pale gold #E3C77B. Signature motifs: draw data and lists as constellations, points joined by 1px white lines at 40 percent opacity with a small label at each star; mark the key data point as a 5px gold #E3C77B star with a soft glow and a thin gold ring around it; add one or two large partial orbit arcs, thin dashed circles below 20 percent opacity, bleeding off the corners. Footer: tiny 'Space Mono' metadata including a latitude reading. Strictly avoid: photographs, filled panels or cards, bright saturated colors, solid chart bars, sans-serif headlines, fully opaque connecting lines. Use this theme for my slides. Ask me what the presentation is about first, then apply the theme to every slide.View this prompt and its data on GitHub
How to use this prompt
From copied text to a finished Observatory deck in four moves.
- 01
Copy the prompt
Use the copy button, or open it pre-filled in Claude or ChatGPT with one click from the panel on this page.
- 02
Tell the AI your topic
The prompt instructs the AI to ask what your presentation is about first. A sentence or a pasted outline is enough.
- 03
Generate and iterate
Ask for more slides or swap a layout. The avoid list at the end of the prompt keeps Observatory on-style while the content changes.
- 04
Or skip straight to a deck
SlideSpeak turns your topic or document into a finished Observatory presentation, exportable as PowerPoint or PDF.
Common questions
Working with the Observatory slide design prompt in practice.
