Sydney Theme for Firefox

Inspired by Sydney's bright harbour mornings, salt-air breezes, and soft coastal light, this theme keeps the editor clean and airy with porcelain whites and misty blues. Gentle ocean surfaces and clear selections preserve focus, while a deep teal accent and warm sandstone highlights add contrast across tabs, borders, and search matches without losing the calm, sunlit feel.

A light theme from the Codigrate Cities collection, released 2026-02-05. Tags: Coastal, Bright, Modern.

Sold on codigrate.com for .99, one payment, tax included: add it to your cart, pay with Stripe (cards, Apple Pay, Google Pay), and download the theme right away. No account needed. Personal licence; a digital download, so all sales are final (see the terms of sale).

Getting started on Firefox

1. Open the theme's Firefox Add-ons page with the Go to store button.
2. Click Add to Firefox and confirm in the prompt that opens.
3. The theme applies at once: the tabs, the toolbar and the address bar take its colors, no restart.
4. Want another look later? Open Add-ons and themes ( Cmd+Shift+A on a Mac, Ctrl+Shift+A on Windows and Linux ) → Themes and enable another theme; switch back the same way any time.

Sydney color palette

• #CAE4EC
• #73B9D0
• #0F91C7
• #ECD268
• #AF8427

Every named color of the Sydney palette, free to download for MacOS, CorelDRAW and Figma.

Sydney on every platform

• Sydney for JetBrains
• Sydney for Xcode ($2.99)
• Sydney for Zed (.99)
• Sydney for Firefox (.99), this page
• Sydney for Sublime Text (.99)
• Sydney for MacOS Terminal (.99)
• Sydney for iTerm2 (.99)
• Sydney for Ghostty (.99)
• Sydney for Rhino (.99)
• Sydney for Slack ($0.99)
• Sydney for Line

From the blog

• Anatomy of a Light Theme: Sydney: Anatomy of Sydney, a light IDE theme: two whites and a harbour blue frame, reef teal and harbour blue code, warmed by sandstone clay and outback gold.