Slate Gray on White Smoke: Contrast Check

Slate Gray (#708090) on white smoke (#F5F5F5) has a 3.72:1 contrast ratio. It passes AA for large text, but fails for normal text.

Your colors

rgb(112, 128, 144)

rgb(245, 245, 245)

Use HEX, RGB, HSL or a CSS color name, without transparency.

Text preview

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Normal text · 16 px

This is how your text will look.

Large text · 32 px

A little contrast matters.

Large text: at least 18 pt regular or 14 pt bold.

3.72:1

Text contrast ratio

Below AA for normal text.

AA · Normal text

4.5:1 required

Fail

AA · Large text

3:1 required

Pass

AAA · Normal text

7:1 required

Fail

AAA · Large text

4.5:1 required

Fail

Pass or fail uses the unrounded ratio.

WCAG 2.2 · SC 1.4.3 and 1.4.6 · Opaque sRGB text pairs

Large text: at least 18 pt regular or 14 pt bold.

View calculation

Foreground luminance: 0.20896704076536146. Background luminance: 0.9130986517934191. Ratio = (lighter + 0.05) / (darker + 0.05) = 3.719000877281677. Thresholds use this unrounded value.

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Supported color inputs and errors →

Using slate gray on white smoke

A Slate Gray caption can appear subtle on White Smoke while still missing the normal-text threshold. For a compact caption, try darker text before changing its size.

WCAG text contrast results

Text criterionRequired ratioResult
AA normal text4.5:1Fail
AA large text3:1Pass
AAA normal text7:1Fail
AAA large text4.5:1Fail

This pair passes AA for large text, but fails for normal text. The displayed ratio is rounded to two decimal places; every decision uses the full calculation.

Choose the result for your text size

A 16 px regular label uses the normal-text result. A 24 px regular heading qualifies as large text. Here that distinction changes the AA result: the heading passes, while the label fails. If a small label fails, try a different color before making the label larger.

.pair-example {
  color: #708090;
  background-color: #F5F5F5;
  font-size: 16px;
}

Try the reverse pair

Use Swap colors to put white smoke text on slate gray. The ratio remains 3.72:1, but the page can feel very different when most of it becomes slate gray. Check the new arrangement with real text and the surrounding layout.

Sources and further reading