Skip to main content

Sky Palette — Physical Sky Color Engine & Solar Architecture

Copied

Live Atmospheric Palette & Astronomical Solar Position

Bucharest HQ · 15:17 EET
Suggested:
15:17

Nov 14 · Bucharest

16:51 · Sunset transition

Capture: 16:52 EET
Herastrau Park, Bucharest
@sky-bucharest-48b Matched Palette
16:51 Sunset
Sun elevation: +0.8° · Azimuth: 236°
Preetham physical sky model
5-SWATCH PROFILE Tap to copy
Zenith
#121734
Mid-Sky
#2A1F42
Horizon
#943440
Sun Glow
#E06038
Cloud Tint
#FC9858
16:51
Photos from this day Click photo for reference image
07:18
Herastrau Park
15:02
Calea Victoriei
16:51 Active
Dambovita Quay
17:25
Palace of Parliament

Share a photo of your sky

Drop your sky photo here

or choose from gallery

JPG, PNG, HEIC up to 25MB · EXIF extracted

Extracted colors Valid sky photo
IMG_5891.HEIC
#121734
Zenith
#2A1F42
Mid-Sky
#943440
Horizon
#E06038
Sun Glow
#FC9858
Cloud
Contributor handle: sky-bucharest-48b

No account needed · Automated solar physics & quality review

Share Sky Card

Select an aesthetic card layout

Style
Sky Palette · No. 14

BUCHAREST

44.4268° N, 26.1025° E

NOV 14
#121734 #2A1F42 #943440 #E06038 #FC9858
Sunset 16:51 EET skypalette.app
Share to:
SP

Sky Palette v1.2.0

Physical sky color engine & solar architecture

Sky Palette calculates natural 5-swatch color palettes (Zenith, Mid-Sky, Horizon, Sun Glow, Cloud Tint) from physically-based solar scattering models, real-time meteorological cloud dynamics, and moderated crowdsourced sky photography.

GitHub Repository Report a Bug Release Notes

Core Technologies

Preetham & Hosek-Wilkie
Physical atmospheric scattering equations modeling Rayleigh (air) and Mie (aerosol) sunlight absorption.
SunCalc Solar Physics
Sub-degree astronomical solar elevation, azimuth, and golden/twilight phase calculation by latitude and longitude.
Open-Meteo Solar API
Real-time stratified cloud layering (low, mid, high) and diffuse radiation without API keys.
Vanilla Modern Web
Fast zero-runtime architecture with HTML5 Canvas, CSS Grid, and Tailwind CSS. Zero bloat.
Cloudflare D1 & R2 Storage
Serverless SQLite at the edge and zero-egress photo object storage for community contributions.
Cloudflare Edge & Analytics
Global edge caching, TLS security, and non-invasive privacy-preserving web telemetry.

Usage Monitoring & Telemetry

Cloudflare Web Analytics (Privacy-First)

To monitor application health, traffic volume, and performance (such as Largest Contentful Paint and interaction responsiveness), Sky Palette utilizes Cloudflare Web Analytics.

  • Zero Cookies: No cookies or client-side storage are ever set or read for telemetry.
  • Zero Fingerprinting: No device fingerprints, canvas hashes, or cross-site tracking IDs.
  • Zero Personal Data: IP addresses are never logged or stored. Aggregate metrics only.
  • GDPR & ePrivacy Compliant: Does not require consent banners because no personal data is processed.

Privacy & Cookies

100% Cookie-Free

Sky Palette is built on strict data minimalism:

No User Accounts: Anyone can explore palettes and submit photos anonymously.
Zero Cookies: No database or session cookies. Cloudflare D1 and Workers operate via edge bindings without tracking.

Read our complete legal documents: Privacy Policy · Terms of Service

Licenses & Credits

Sky Palette Web Codebase
Open-source software release.
MIT
Community Contributed Sky Photos
All submitted and verified sky photography is dedicated to the public domain.
CC0 1.0
Open-Meteo Meteorological Data
Weather data provided under Creative Commons Attribution 4.0.
CC BY 4.0
Design & Unslop Methodology
Unslopped with methodology by Damir Sokolovsky (@heydamir).
CC BY 4.0

Release Notes

v1.2.0 · Jog-Dial Scrubber & Unboxed Polish November 2026
  • Added unified tactile horizontal ruler jog-dial scrubber on Home and Gallery Day Details.
  • Perceptual luminance contrast engine ($Y = 0.299R + 0.587G + 0.114B$) for smooth analog text and needle illumination.
  • Responsive mobile top bar in gallery preventing button collisions on narrow viewports.
  • Unboxed clean white modal canvas for crowdsourced photo submissions with direct adjacent color previews.
  • Added project info, licenses, privacy disclosure, and non-invasive usage monitoring details.
v1.1.0 · Atmospheric Telemetry Sharing November 2026
  • Strava-style atmospheric telemetry cards (Studio, Dark, Horizon, Minimal).
  • Client-side high-resolution PNG export with single-tap clipboard copy and social sharing.
  • Full-screen zero-scroll 15-day sunset mosaic gallery.
v1.0.0 · Initial Release November 2026
  • Preetham skylight physics simulation for Bucharest HQ.
  • 5-swatch palette extraction engine (Zenith, Mid-Sky, Horizon, Sun Glow, Cloud Tint).
  • Zero-account anonymous sky photo contribution flow.
Bucharest HQ · 44.4°N, 26.1°E · MIT & CC0
Report Bug