rgb color tester

The RGB Color Tester accepts color inputs in RGB, HEX, or HSL and outputs normalized values across all formats. It validates numeric ranges and preserves alpha when provided. It computes perceptual luminance and contrast ratios against a chosen background to support accessible color choices. The tool is designed for designers, frontend engineers, and accessibility specialists who need consistent color tokens across platforms and codebases.
Conceptually, inputs are parsed and converted using standard color-space formulas. The resulting RGB, HEX, and HSL representations are produced, while optional alpha is carried through. Luminance is calculated from linearized RGB values, and contrast ratio follows WCAG guidelines to indicate readability on the selected background. This enables quick assessments of whether color pairs meet accessibility thresholds for body text and UI elements.
Its unique value lies in integrated cross-format conversions with built-in accessibility metrics, enabling tokenization for design systems and CSS pipelines. Core features include input parsing, bi-directional format conversions, alpha support, luminance and contrast calculations, and explicit validation with actionable feedback. Typical use cases include selecting accessible text/background combinations, exporting color values for CSS variables, and auditing palettes for consistency across products.