891: Light and Dark Mode
1Digest
This podcast provides a comprehensive guide to implementing light and dark modes in web applications. It begins by introducing the improved browser support for these features and then dives into building light and dark modes from scratch, emphasizing the use of CSS variables for efficient color management. The `light-dark`, `color-mix`, and `relative-color` functions are highlighted as key tools for dynamic color switching and adjustments. The podcast also addresses integrating dark mode into existing websites, suggesting refactoring CSS to utilize variables and leveraging AI tools to assist in the conversion process. A significant portion focuses on color contrast and accessibility, discussing the limitations of `contrast-color` and advocating for manual checks and tools like Polypane for thorough testing. Finally, the podcast covers handling images and icons in both modes, recommending the `<picture>` element for images and CSS manipulation for inline SVGs. The podcast concludes with a call to action, encouraging listeners to share their own implementation techniques.
Outlines
Implementing Light and Dark Mode in Web Applications
This podcast covers building and integrating light and dark modes into websites, focusing on CSS variables, color functions (`light-dark`, `color-mix`, `relative-color`), accessibility, and image/icon handling.
Building and Integrating Dark Mode
Details building light and dark modes from scratch using CSS variables, the `light-dark` function, and techniques for handling color variations with `color-mix` and `relative-color`. Also covers adding dark mode to existing sites via CSS refactoring and AI-assisted conversion.
Accessibility and Image Handling
Focuses on color contrast and accessibility considerations, including using tools like Polypane. Explains handling images with `<picture>` and inline SVGs using CSS for color changes.
Keywords
Light mode
The default, typically brighter, interface theme of a website or application.
Dark mode
An alternative interface theme with a darker background and lighter text, often preferred for low-light conditions.
CSS Variables
Custom properties in CSS that store values (like colors) and can be reused throughout a stylesheet.
light-dark function (CSS)
A CSS function that simplifies color switching between light and dark modes.
color-mix function (CSS)
A CSS function that blends two colors together.
relative-color function (CSS)
A CSS function that manipulates color channels for precise color adjustments.
Color Contrast
The difference in luminance between foreground and background colors, crucial for accessibility.
Accessibility Testing
Evaluating a website or application for usability by people with disabilities.
`<picture>` element
HTML element for responsive images, useful for handling different image versions for light and dark modes.
Inline SVGs
Scalable Vector Graphics embedded directly in HTML, allowing for easy styling with CSS.
Q&A
How can I efficiently implement light and dark mode in a new web application?
Utilize CSS variables and the `light-dark` function for efficient color switching. Explore `color-mix` and `relative-color` for more complex color variations.
My website already exists; how can I add dark mode?
Refactor your CSS to use variables and the `light-dark` function. AI tools can assist with conversion, but manual adjustments may be needed.
How do I handle images and icons in light and dark mode?
Use the `<picture>` element for images and adjust the `fill` color of inline SVGs with CSS.
What are the key accessibility considerations for light and dark mode?
Ensure sufficient color contrast in both modes and use accessibility testing tools like Polypane.
Show Notes
Light mode? Dark mode? Scott and Wes break down the best ways to implement theme switching in CSS, from prefers-color-scheme to manual overrides. Plus, tips on handling shadows, icons, and the dreaded flash of dark mode!
Show Notes- 00:00 ">00:00 Welcome to Syntax!
- 01:05 ">01:05 Brought to you by Sentry.io.
- 02:06 ">02:06 Light and dark mode, things to consider.
- 02:31 ">02:31 Light and dark mode from scratch.
- drop-in.css.
- 04:41 ">04:41 Calculations vs assigned color.
- 05:32 ">05:32 color-mix and relative color.
- 08:15 ">08:15 Foreground and background variables.
- –tint-or-shade: color-mix(in oklab, var(–fg), transparent 95%);
- –tint-or-shade-harder: color-mix(in oklab, var(–fg), transparent 90%);
- 09:13 ">09:13 Setting color scheme.
- 12:38 ">12:38 light-dark function in CSS.
- 15:48 ">15:48 Manually setting dark mode.
- 19:52 ">19:52 Shoehorning in dark mode.
- 22:25 ">22:25 Other things to consider.
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Wes: X Instagram Tiktok LinkedIn Threads
Table of contents
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