Does Hex Contrast Pair upload my file or text to Tool-You servers?

No. Hex Contrast Pair runs in this browser tab. Files stay on the device. Limit note: Two valid hex colors.

Should I use Contrast Checker instead of Hex Contrast Pair?

Use Hex Contrast Pair when you need Contrast ratio of two hex colors. Use Contrast Checker when you need WCAG contrast ratio for two colors. They share a category (Design) but not the same job.

Hex Contrast Pair

Contrast ratio of two hex colors.

Computes WCAG contrast ratio between two hex colors. Unlike Contrast Checker UI this is a focused calc. Bad hex fails.

What Hex Contrast Pair does

Computes WCAG contrast ratio between two hex colors. Unlike Contrast Checker UI this is a focused calc. Bad hex fails.

The interactive controls for Hex Contrast Pair load after this article so crawlers still read the instructions. Path /design/hex-contrast-pair is the canonical address. Work happens on this device; Tool-You does not take a copy of the file or pasted text for Hex Contrast Pair.

How to use Hex Contrast Pair

Use Hex Contrast Pair for this design job (design · hex contrast pair). Contrast Checker is adjacent (WCAG contrast ratio for two colors.) but not the same.
Add the file type Hex Contrast Pair accepts. Hint from the path: design · hex contrast pair. Contrast ratio of two hex colors.
Set only the options that match Hex Contrast Pair. Neighbor Hex Luminance does something else (Relative luminance with light/dark tip.). Tool note: Computes WCAG contrast ratio between two hex colors. Unlike Contrast Checker UI this is a focused calc. Bad hex fails.
Run Hex Contrast Pair in this tab. Browser memory still applies: Two valid hex colors.
Download or copy the result from Hex Contrast Pair. If it is the wrong job, open Contrast Checker instead.

When not to use Hex Contrast Pair

Skip Hex Contrast Pair when a neighbor tool matches better — start with Contrast Checker or Hex Luminance — or when the description already warns the job will fail. In the tool’s own words: Computes WCAG contrast ratio between two hex colors. Unlike Contrast Checker UI this is a focused calc. Bad hex fails.

Questions about Hex Contrast Pair

What does Hex Contrast Pair do that other Design pages on this site do not?: Computes WCAG contrast ratio between two hex colors. Unlike Contrast Checker UI this is a focused calc. Bad hex fails. Short version: Contrast ratio of two hex colors.
Does Hex Contrast Pair upload my file or text to Tool-You servers?: No. Hex Contrast Pair runs in this browser tab. Files stay on the device. Limit note: Two valid hex colors.
Should I use Contrast Checker instead of Hex Contrast Pair?: Use Hex Contrast Pair when you need Contrast ratio of two hex colors. Use Contrast Checker when you need WCAG contrast ratio for two colors. They share a category (Design) but not the same job.
What are the limits of Hex Contrast Pair?: Two valid hex colors. Also: Computes WCAG contrast ratio between two hex colors. Unlike Contrast Checker UI this is a focused calc. Bad hex fails.