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diff --git a/site/content/docs/5.0/utilities/colors.md b/site/content/docs/5.0/utilities/colors.md index 266f671f6d..9502c48777 100644 --- a/site/content/docs/5.0/utilities/colors.md +++ b/site/content/docs/5.0/utilities/colors.md @@ -23,10 +23,51 @@ Colorize text with color utilities. If you want to colorize links, you can use t <p class="text-white-50 bg-dark">.text-white-50</p> {{< /example >}} +{{< callout warning >}} +**Deprecation:** With the addition of `.text-opacity-*` utilities and CSS variables for text utilities, `.text-black-50` and `.text-white-50` are deprecated as of v5.1.0. They'll be removed in v6.0.0. +{{< /callout >}} + {{< callout info >}} {{< partial "callout-warning-color-assistive-technologies.md" >}} {{< /callout >}} +## Opacity + +<small class="d-inline-flex px-2 py-1 font-monospace text-muted border rounded-3">Added in v5.1.0</small> + +As of v5.1.0, text color utilities are generated with Sass using CSS variables. This allows for real-time color changes without compilation and dynamic alpha transparency changes. + +### How it works + +Consider our default `.text-primary` utility. + +```css +.text-primary { + --bs-text-opacity: 1; + color: rgba(var(--bs-primary-rgb), var(--bs-text-opacity)) !important; +} +``` + +We use an RGB version of our `--bs-primary` (with the value of `13, 110, 253`) CSS variable and attached a second CSS variable, `--bs-text-opacity`, for the alpha transparency (with no default value, but a fallback of `1`). That means anytime you use `.text-primary` now, your computed `color` value is `rgba(13, 110, 253, 1)`. + +### Example + +To change that opacity, override `--bs-text-opacity` via custom styles or inline styles. + +{{< example >}} +<div class="text-primary">This is default primary text</div> +<div class="text-primary" style="--bs-text-opacity: .5;">This is 50% opacity primary text</div> +{{< /example >}} + +Or, choose from any of the `.text-opacity` utilities: + +{{< example >}} +<div class="text-primary">This is default primary text</div> +<div class="text-primary text-opacity-75">This is 75% opacity primary text</div> +<div class="text-primary text-opacity-50">This is 50% opacity primary text</div> +<div class="text-primary text-opacity-25">This is 25% opacity primary text</div> +{{< /example >}} + ## Specificity Sometimes contextual classes cannot be applied due to the specificity of another selector. In some cases, a sufficient workaround is to wrap your element's content in a `<div>` or more semantic element with the desired class. @@ -57,6 +98,14 @@ Grayscale colors are also available as a Sass map. **This map is not used to gen {{< scss-docs name="gray-colors-map" file="scss/_variables.scss" >}} +RGB colors are generated from a separate Sass map: + +{{< scss-docs name="theme-colors-rgb" file="scss/_variables.scss" >}} + +And color opacities build on that with their own map that's consumed by the utilities API: + +{{< scss-docs name="utilities-text-colors" file="scss/_variables.scss" >}} + ### Utilities API Color utilities are declared in our utilities API in `scss/_utilities.scss`. [Learn how to use the utilities API.]({{< docsref "/utilities/api#using-the-api" >}}) |