Contrast Checker

Enter foreground and background HEX colors to see contrast ratio and AA/AAA pass/fail results, with a live text preview.

Introduction

Color Contrast Checker is a free, browser-based utility in our Color Tools collection. Enter foreground and background HEX colors to see contrast ratio and AA/AAA pass/fail results, with a live text preview. Color Contrast Checker calculates WCAG 2 contrast ratios locally so you can verify readable text colors for accessibility before shipping UI. Everything runs locally in your browser — inputs stay on your device, with no account or upload required. Highlights include wcag contrast ratio.

Features

WCAG contrast ratio
AA and AAA checks
Live preview text
Copy ratio

How to use

1
Enter foreground and background HEX colors.
2
Review the ratio and pass/fail cards.

Example

Black on white

Input

#111111 on #ffffff

Output

High contrast pass

Benefits

Run Contrast Checker entirely in the browser with no signup or installation.
Keep sensitive sample data private — processing never leaves your device.
WCAG contrast ratio
AA and AAA checks
Live preview text
Pair it with Color Picker and HEX ↔ RGB when your workflow needs adjacent utilities.

FAQs

WCAG treats 18pt+ (or 14pt bold) as large text, which has a lower AA threshold (3:1).

Yes. No colors are uploaded.

Relative luminance contrast ratio from WCAG 2.

Yes. Contrast Checker on EverydayDevTools is free, with no account, watermarks, or usage caps for normal interactive use.

No. Contrast Checker runs in your browser. Your input is processed locally and is not sent to EverydayDevTools servers.

Enter foreground and background HEX colors to see contrast ratio and AA/AAA pass/fail results, with a live text preview. It fits everyday color tools tasks when you want a fast local utility instead of installing a CLI or opening a heavy IDE feature.

Core capabilities include: WCAG contrast ratio; AA and AAA checks; Live preview text; Copy ratio.

Developers often pair Contrast Checker with Color Picker, HEX ↔ RGB, Gradient Generator. Open Related tools on this page for quick links.