Hex Color Validator

The tool validates hex color strings used in web design, useful for developers, UI engineers, and QA testers who insert hex colors into stylesheets or design tokens. It accepts common formats and returns precise outputs for automated pipelines.
Under the hood, the validator parses the input, normalizes the value, and checks length and allowed characters. It supports 3-digit (#rgb), 4-digit with alpha (#rgba), 6-digit (#rrggbb), and 8-digit with alpha (#rrggbbaa). It converts the value to RGB and RGBA values on a 0–255 scale and derives equivalent HSL values. The tool then returns a validity flag, a normalized lowercase hex, and numeric color components suitable for test assertions or style validation scripts.
This is valuable for frontend teams, design systems, accessibility reviews, and CI pipelines that enforce color standards. Its CSS-accurate validation, clear outputs, and alpha handling set it apart from simple pattern checks. Use cases include validating color tokens, ensuring theme consistency, and preparing colors for conversions to other color spaces.