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#d54400 on #ffffff contrast ratio

4.51:1

Dark orange text (#d54400) on a white background (#ffffff) meets WCAG 2.2 level AA for normal text. It passes 4 of 5 checks below.

Swap: #ffffff on #d54400

Large text sample

Normal body text in #d54400 on #ffffff. The quick brown fox jumps over the lazy dog.

WCAG 2.2 results

WCAG 2.2 contrast results for #d54400 on #ffffff
Normal text — WCAG 1.4.3 AA4.5:1Pass
Large text — WCAG 1.4.3 AA3:1Pass
UI components & icons — WCAG 1.4.11 AA3:1Pass
Normal text — WCAG 1.4.6 AAA7:1Fail
Large text — WCAG 1.4.6 AAA4.5:1Pass

Nearest passing colours

How it looks with colour blindness

Simulated with the Machado et al. (2009) model at full severity.

  • Aa

    Protanopia (no red cones)

    6.11:1

  • Aa

    Deuteranopia (no green cones)

    3.81:1

  • Aa

    Tritanopia (no blue cones)

    4.54:1

  • Aa

    Achromatopsia (no colour)

    4.54:1

Try a different pair

Colours

Hex, rgb() or hsl(). Alpha is composited.

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Preview

Large heading text

Normal body text at 14 px. The quick brown fox jumps over the lazy dog.

Outlined buttonA text link

Colour-blindness preview

Simulated with Machado et al. (2009), full severity.

  • AaProtanopia (no red cones)6.11:1
  • AaDeuteranopia (no green cones)3.81:1
  • AaTritanopia (no blue cones)4.54:1
  • AaAchromatopsia (no colour)4.54:1

Contrast ratio

4.51:1

WCAG 2.2 contrast verdicts
CheckCriterionNeedsResult
Normal text1.4.3 AA4.5:1Pass
Large text1.4.3 AA3:1Pass
UI components & graphics1.4.11 AA3:1Pass
Normal text1.4.6 AAA7:1Fail
Large text1.4.6 AAA4.5:1Pass

Nearest passing colours

Same hue, lightness adjusted in OKLCH.

AA — 4.5:1

Already passes.

AAA — 7:1

Change text

#b01a00 · 7.01:1

Change background: no colour with this hue reaches the target.

Large text means at least 24 CSS px, or 18.66 CSS px bold. Ratios are truncated, never rounded, so 4.49:1 is shown as failing 4.5:1.

Questions about this pair

Is #d54400 on #ffffff accessible?
Yes for WCAG 2.2 level AA: the contrast ratio is 4.51:1, above the 4.5:1 needed for normal text. It does not reach the 7:1 needed for AAA.
What is the contrast ratio of #d54400 and #ffffff?
4.51:1, calculated with the WCAG 2.2 relative luminance formula. The ratio is truncated, not rounded, so it never shows a failing pair as passing.
What colour passes AA on #ffffff?
#b01a00 is the closest colour to #d54400 — same hue, adjusted lightness — that reaches 4.5:1 on #ffffff.

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