Slate 900 on White - WCAG Contrast Check

The quick brown fox jumps over the lazy dog

Contrast Ratio

17.85

to 1

AA NormalPASS

AAA NormalPASS

AA LargePASS

AAA LargePASS

Color Details

Text Color

Slate 900

#0f172atext-slate-900

Background Color

White

#ffffffbg-white

WCAG Compliance

Criterion	Min Ratio	Result
Normal Text AA	4.5:1	PASS
Normal Text AAA	7:1	PASS
Large Text AA	3:1	PASS
Large Text AAA	4.5:1	PASS

Code Examples

Tailwind CSShtml

<!-- Text color: text-slate-900 -->
<!-- Background: bg-white -->
<div class="bg-white p-6 rounded-lg">
  <p class="text-slate-900">
    Your accessible text here
  </p>
</div>

Plain CSScss

/* Text: #0f172a on Background: #ffffff */
.accessible-container {
  background-color: #ffffff;
  color: #0f172a;
  padding: 1.5rem;
  border-radius: 0.5rem;
}

Use Cases

Heading text on light cards
Sidebar navigation labels
Dashboard metric values

Accessible Alternatives

text-slate-5004.76:1

bg-white

text-slate-6007.58:1

bg-white

text-black21.00:1

bg-white

Frequently Asked Questions

Is slate 900 text on white accessible?▼

Yes, this combination passes WCAG AA with a contrast ratio of 17.85:1, meeting the minimum 4.5:1 requirement for normal text.

What is the contrast ratio of slate 900 on white?▼

The contrast ratio is 17.85:1. WCAG AA requires at least 4.5:1 for normal text and 3:1 for large text. WCAG AAA requires 7:1 for normal text and 4.5:1 for large text.

Does this combination meet WCAG AAA?▼

Yes, with a 17.85:1 contrast ratio, this combination meets the strictest WCAG AAA standard (7:1 minimum), making it excellent for maximum accessibility.