Enforce HSL color format and CSS custom properties in CSS files.
npx skills add https://github.com/cynthiateeters/hybit-svg --skill css-standards
Please help me install this Agent Skill. Skill: css-standards Source: https://github.com/cynthiateeters/hybit-svg/tree/main/.claude/skills/css-standards Command: npx skills add https://github.com/cynthiateeters/hybit-svg --skill css-standards
This Skill ensures CSS color tokens follow a single, modern standard. It prevents hardcoded hex/rgb colors and enforces the use of HSL color formats and CSS custom properties, enabling a consistent design system and easier theme updates.
Use this skill before writing any CSS to set up the color tokens and enforcement rules in your project.
High-intent search queries and answers about installing and using this skill.
HSL color format with CSS custom properties creates a single source of truth for colors. Define all colors in :root as CSS variables using hsl() syntax, then reference them with var() throughout your stylesheets. This enables consistent theming and prevents hardcoded hex or rgb values from fragmenting your design system.
HSL (hue, saturation, lightness) is more human-readable and accessible than hex or RGB. It lets you adjust brightness and saturation predictably, supports alpha transparency directly in the hsl() function, and makes semantic color relationships clearer for maintaining design systems at scale.
Define color tokens in :root using CSS custom properties with hsl() syntax, including alpha values where needed. Name them semantically (e.g., --color-primary, --color-success) and reference them with var() in all component styles. This approach centralizes color management and makes theme updates require changes in one place only.
Yes. CSS custom properties and hsl() syntax work in all modern browsers. You can migrate existing hex or rgb colors to HSL and CSS variables incrementally—update :root with new token definitions, then gradually replace hardcoded colors with var() references across components and templates.
Not necessarily. Most design tools and online converters translate hex and RGB colors to equivalent HSL values. Once converted to :root CSS variables, you define colors once and reference them everywhere, eliminating redundancy and making future adjustments faster.
HSL separates lightness from hue, making it easier to ensure sufficient contrast ratios and maintain accessible color relationships. CSS variables enable consistent application of accessible colors across components, and the hsl() syntax supports alpha transparency for layering without hardcoding opacity values separately.
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