ColorsMine vs contrast checkers
If you are comparing these two, you have a pair and you want the ratio.
The short version. contrast checkers is the general class of tools that measure one foreground against one background. ColorsMine starts where a palette ends: it turns colour into a token system and then measures whether that system is usable. They overlap less than the search suggests.
Use contrast checkers when
you genuinely only have one pair to check. That is a real job and this page is not going to pretend otherwise.
What ColorsMine adds
Every pair a palette implies at once, plus the nearest colour that would have passed — and a grade for the set rather than a verdict per pair.
What ColorsMine actually produces
| From | You get |
|---|---|
| One brand hex | 8 primitive ramps and 57 semantic variables — surface, text, border, primary, secondary, accent, and success / info / warning / danger — in light and dark |
| An image | Ten semantic roles with an 11-step OKLCH scale each, deterministically: the same image always gives the same palette |
| An existing palette | A grade out of 100 across contrast, colour-blind safety, harmony, distinctness and tonal range, plus the single change that moves it most |
| A Figma collection | Every mode graded, every canvas layer scanned for real contrast failures, and a proof frame that renders in both themes |
| A repository | npx colorsmine check --min B --wcag — the same engine as a build gate |
What it is checked against
- WCAG 2.2 — 4.5:1 for body text (1.4.3), 3:1 for large text and non-text contrast (1.4.11), 7:1 for AAA.
- APCA Lc, which accounts for polarity and disagrees with the ratio often enough to be worth reading.
- Protanopia, deuteranopia, tritanopia, and greyscale.
Cost and access
ColorsMine is free, needs no account, and makes no network calls — the palette engine, the 10,368,048-palette catalogue and the grading all run locally. Nothing you open leaves your machine.
This page describes contrast checkers at the level of what kind of tool it is, not as a feature comparison — tools ship and a feature table written today is wrong by next quarter. Check its own site for what it does now.
Other comparisons
Try it on a colour you already have
Paste a hex and see the whole system it implies, graded, in about a second.
Open ColorsMine