Interactive post on OKLCH color space | Little Things
Limitations of sRGB, and how OKlch makes color transitions smoother and more natural, just like the human eye perceives them. Introduction The average person has three types of cones in their eyes that process color by separating light into red, green, and blue signals. These signals are then combined in the brain to create a complete visual picture. Our eyes detect colors through these cones, eac
Orange You Accessible? A Mini Case Study on Color Ratio | Bounteous
Orange You Accessible? A Mini Case Study on Color Ratio I recently completed work for a client who used orange heavily in their branding: it was in their print ads, brochures, posters, and signage, and they wanted to incorporate it on their website. This led to a comparison of orange buttons. Can you guess which button is more accessible? If you guessed the left button, congrats! You are an access
contrast-color() is a good thing, but also solving the problem at the wrong layer
Browsers are a failure of imagination. I understand that new browser features and functionality need to be rolled out with care, in that you need to accommodate a wide range of technological literacy and familiarity. This is to say nothing of built-up muscle memory and the risk of change aversion. That said, the long view of the convergent evolution that are web browsers leaves me wanting. Functio
On compliance vs readability: Generating text colors with CSS • Lea Verou
Can we emulate the upcoming CSS contrast-color() function via CSS features that have already widely shipped? And if so, what are the tradeoffs involved and how to best balance them? Relative Colors Out of all the CSS features I have designed, Relative Colors aka Relative Color Syntax (RCS) is definitely among the ones I’m most proud of. In a nutshell, they allow CSS authors to derive a new color f
Creating color palettes with the CSS color-mix() function | MDN Blog
Colors can sometimes get out of hand in a project. We often start with a few well-chosen brand colors, but over time, we may find ourselves adding variations as our project grows. Perhaps we realize that we need to adjust the lightness of a button color for accessibility reasons, or that we need a slightly different variant of a component. How do we ensure that the colors we choose fit within the
Okay, Color Spaces — ericportis.com
Colors… in… spaaaaaaace What is a “color space?” Well first you take some colors. red yellow blue And then you arrange them, however you like, into some kind of space: The space has coordinates. In the little toy color space we've just defined, red is at (x=0,y=1), yellow is at (-1,-1 ), and blue is at ( 1, -1 ). That’s a color space! You might ask: what kind of color might we find at the origin:
Workarounds for Buggy Gradients
CSS has a great new feature where you can specify the color space to use by adding in <colorspace> to the gradient (not yet supported in Firefox). This is especially useful for avoiding the gray dead zone that comes from rectangular color spaces like the default sRGB. Just look at the difference between a blue-to-yellow gradient in srgb compared to oklch with the same beginning and end: linear-gra
第1回 デジタルコンテンツの視認性とWCAG2のコントラスト比の課題 | gihyo.jp
はじめに サイオステクノロジーの伊藤と申します。今回から数回にわたりデジタルコンテンツのコントラストというテーマで、WCAG2のコントラスト基準とWCAG3で検討が進められている新しい基準APCAについて解説していきます。 対象読者としては、ウェブサイトやアプリケーションなどデジタルコンテンツの制作に携わるデザイナーやエンジニア、アクセシビリティに関心のある方を想定しています。 現在勧告されているWCAG2の達成基準では、テキストや視覚要素のコントラストが一定の基準を満たす必要があります。たとえば、レベルAAでは文字色と背景色のコントラスト比が4.5:1以上であることが要求されます。 図1 テキストとの視認性を確保するために、背景色とのコントラスト比を考える必要がある しかし、人間の目は明るい色と暗い色のコントラストを認識する際に、明るい色の相対輝度が高いほど視認性が高くなるという特性があ
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