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October 11th, 2021 × #css#colors#accessibility

Hasty Treat - Neat Things in CSS Color - Current and Coming!

Discussion of current and upcoming CSS color features like contrast functions, accent colors, color mixing, new color spaces and alpha transparency options.

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In this Hasty Treat, Scott and Wes talk about all things color in CSS, both current and coming soon!

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Show Notes

04:39 - color-contrast()

  • Part of CSS5! Maybe.
  • The color-contrast() functional notation takes a color value and compares it to a list of other color values, selecting the one with the highest contrast from the list.

06:01 - Accent color

07:34 - currentcolor

08:54 - Profiled color values - color()

11:00 - color-mix()

14:18 - Space-separated functional color notations

  • rgba(255 255 255 0) instead of rgba(255,255,255,0.5)

15:28 - RGB and HSL with Alpha

  • rgb() and hsl() can take alpha and percent values - rgb(0 0 0 / 50%) or rgb(0 0 0 / 0.5)

18:22 - Hex + Alpha values

  • RRGGBBAA
  • How do you remember?!?!
  • Transparent

21:49 - lch(), lab(), hwb() notation

  • CIELAB color space aka Lab is a color space.
  • A color space is an organization of colors in coordination color profiling supported by various physical devices, it supports reproducible representations of color
  • Lab is intended as perceptually uniform
  • Perceptually uniform - a perceptual uniform color space ensures that the difference between two colors (as perceived by the human eye) is proportional to the Euclidian distance within the given color space.
  • https://lea.verou.me/2020/04/lch-colors-in-css-what-why-and-how/

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