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Converting Color Spaces in JavaScript

A challenge I faced in building an image "emojifier" was that I needed to change the color spaces of values obtained using getImageData() from RGB to HSL. I used arrays of emojis arranged by brightness and saturation, and they were HSL-based for the best matches of average pixel colors with the emojis.

In this article, we’ll study functions that will be useful for converting both opaque and alpha-enabled color values. Modern browsers currently support the color spaces RGB(A), hex, and … Read article


Switch font color for different backgrounds with CSS

Ever get one of those, "I can do that with CSS!" moments while watching someone flex their JavaScript muscles? That’s exactly the feeling I got while watching Dag-Inge Aas & Ida Aalen talk at CSSconf EU 2018.

They are based in Norway, where WCAG accessibility is not a just good practice, but actually required by law (go, Norway!). As they were developing a feature that allows user-selectable color theming for their main product, they faced a challenge: automatically adjusting … Read article


HSL() / HSLa() is great for programmatic color control

If you ever need to hand-manipulate a color in native CSS, HSL is pretty much the only way. HSL (the hsl() and hsla() functions in CSS) stands for hue, saturation, lightness, and optionally, alpha. We've talked about it before but we can break it down a little more and do some interesting things with it.… Read article

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