Once UI Blog
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Once UI
What made Once UI 2.0 possible
Once UI 2.0 alpha: Measured, not assumed
Colour arrives in pairs
Once UI 1.8: Polish as a feature
Once UI 1.7: Form with Intent
From products to systems: a new service model
Magic Journal: A different medium for long-form writing
Supa Social: The next milestone of our journey
Once UI is open source. Here's how we plan to keep it that way.
Designing a timeless, AI-native brand
Once UI 1.5: Curiosity in code
Once UI 1.4 migration guide: The breakpoint object
Launching in the AI-native era: A guide for indie builders
The first design system for indie builders
Builder Stories
SatisPro and Once UI: Scaling smarter review management
IQON and Once UI: Scaling with a design system
OsmyReal: Launching a platform for mobile gaming with minimal coding
JExcellence and Once UI: Turning experiments into enterprise apps
Dev: Blending science and code with Once UI
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Once UI Blog
Posts
Once UI
What made Once UI 2.0 possible
Once UI 2.0 alpha: Measured, not assumed
Colour arrives in pairs
Once UI 1.8: Polish as a feature
Once UI 1.7: Form with Intent
From products to systems: a new service model
Magic Journal: A different medium for long-form writing
Supa Social: The next milestone of our journey
Once UI is open source. Here's how we plan to keep it that way.
Designing a timeless, AI-native brand
Once UI 1.5: Curiosity in code
Once UI 1.4 migration guide: The breakpoint object
Launching in the AI-native era: A guide for indie builders
The first design system for indie builders
Builder Stories
SatisPro and Once UI: Scaling smarter review management
IQON and Once UI: Scaling with a design system
OsmyReal: Launching a platform for mobile gaming with minimal coding
JExcellence and Once UI: Turning experiments into enterprise apps
Dev: Blending science and code with Once UI
Guides

Colour arrives in pairs

Once UI colour is four pairings, not a palette you pick from: background with onBackground, solid with onSolid, alpha over whatever sits behind, and surface when you want the theme to decide. Use the pairs; leave sand-700 alone.
Updated 3h ago
Once UI 2.0 alpha: Measured, not assumed
Once UI 1.8: Polish as a feature
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