Product·Aug 28, 2026·4 min read
Why we rebuilt every tool to run 100% in your browser
A few of our earliest converters sent your input to a small backend for processing - nothing was logged, but it still meant a network round-trip and, in principle, a color passing through a server we controlled. Over the past few months we rewrote every tool to compute conversions entirely in JavaScript on your device. Here's why that mattered enough to prioritize, and what changed under the hood for formats like LAB that involve less common math.
Guide·Aug 21, 2026·6 min read
HEX vs RGB vs HSL: which format should you actually use?
Three ways to write the same color, each suited to a different job. A plain-language breakdown of when to reach for HEX, RGB or HSL in CSS, design files and code - and why HSL makes "make it 10% darker" trivial in a way HEX never will.
Color theoryCSS
Guide·Aug 12, 2026·5 min read
WCAG contrast ratios, explained without the jargon
What "4.5:1" actually means, the difference between AA and AAA, and why a color pair can pass for body text but fail for a button label. Includes the exact thresholds our Contrast Checker tool tests against.
AccessibilityDesign
Guide·Jul 30, 2026·5 min read
The EyeDropper API: what it does and why it's Chromium-only
The browser-native EyeDropper API lets you sample any pixel on your screen without a plugin - but only in Chromium-based browsers so far. A look at how it works, its current browser support, and the fallback we use when it's unavailable.
BrowsersTools
Guide·Jul 18, 2026·7 min read
CMYK vs RGB: why your colors look different on paper
RGB describes light emitted from a screen; CMYK describes ink absorbed on paper. That difference in physical models is why a vivid on-screen purple can print duller than expected - and why there's no single "correct" RGB-to-CMYK conversion.
PrintColor theory
Guide·Jul 3, 2026·4 min read
Building a palette that doesn't look like a template
A quick framework for picking a primary, a supporting accent and a neutral scale - and a few common palette mistakes, like accents that are too close in lightness to read as distinct.
DesignPalettes
Update·Jun 25, 2026·3 min read
New: LAB color support and 4 additional converters
We added RGB↔LAB conversion for people working with perceptually uniform color spaces, along with HSV, decimal and grayscale converters. A short changelog of what's new and what's next.
ProductChangelog
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