Color Luminance Report

Calculate relative luminance and black-or-white text contrast.

About this tool

Calculate relative luminance and black-or-white text contrast. This focused utility is designed for repeatable, everyday work in the colors department. Enter source values in the editor and review the generated result before using it in a project. Processing happens locally in this browser, so submitted text is not sent to Tool Fly. The page includes clear instructions, practical use cases, and limitations to help you verify output. No account or paid API is required, and you can copy the result into your own workflow.

How to use this tool

  1. Enter or paste your input.
  2. Run Color Luminance Report and review the generated result.
  3. Copy or download the output if it meets your needs.

How it works

The Color Luminance Report processes your input in the browser and shows a result you can review, copy, or download.

When to use this tool

  • Calculate relative luminance and black-or-white text contrast.
  • Quick local color luminance report tasks
  • Preparing reusable project content

Limitations

Check the Color Luminance Report output against your project requirements before publishing or relying on it.

Privacy

The Color Luminance Report input is processed in the browser and is not sent to Tool Fly.