Color
Accessible Palette – Create color systems with consistent lightness and contrast
Accessible Color Generator – Show me the closest variations of COLOR that contrast against BACKGROUND COLOR enough to meet ACCESSIBILITY GUIDELINES
Contrast Grid – Test many foreground and background color combos for compliance with WCAG 2.0 minimum contrast.
Coolers – color palette generator
Optimal Overlay Finder – For Readable Text on a Background Image
Vivid Gradient Generator – we interpolate the gradient in a hue-based color system, such as HCL, HSB, or HCL (not RGB) 🤓. This avoids the line of gray that goes through the center of every color space.
Gradient Easing Generator – Create and preview your own easing gradients in CSS.
Typography
The Good Line-Height – the good line-height calculates the exact number so it always fits the baseline grid!
Graphics
Clippy – The clip-path
property allows you to make complex shapes in CSS by clipping an element to a basic shape (circle, ellipse, polygon, or inset), or to an SVG source.
Hero Generator –
Layout
Flexbox Patterns – Flexbox is awesome, but it introduces many new concepts that can make it difficult to use. These interactive examples will show you practical ways to use it to build UI components.
Tools
Tiny Helpers – single task tools
Omatsuri – Open source browser tools for everyday use
Reference
Web Skills – reference deck with links to explain a variety of web elements
CSS-only Carousel