Contrast Check: #0000EE on #FFFFFF

Browser default link blue (#0000EE) on White (#FFFFFF) — 9.40:1, passes AAA normal.

At a glance

Contrast ratio
9.40:1
WCAG AA (normal text)
Pass
WCAG AA (large text)
Pass
WCAG AAA (normal text)
Pass
UI components / non-text
Pass

Browser default link blue text on a white background is one of the most frequently checked combinations in web design. The measured WCAG 2.1 contrast ratio is 9.40:1. It passes WCAG AAA for body text — the strictest standard. The user-agent default for unvisited links since the early days of the web. Stronger contrast than Bootstrap’s default link color.

Frequently asked questions

Is #0000EE on #FFFFFF accessible?
For WCAG 2.1 AA — the most common conformance target — the answer is yes for normal-size body text. Normal text needs 4.5:1 and this combination measures 9.40:1. Large text (18pt+ or 14pt+ bold) needs only 3:1, so this combination passes for headings and large UI labels. AAA conformance demands 7:1; this combination passes that bar.
Where is this combination commonly used?
Browser default link rendering when no CSS specifies otherwise.
How is this ratio calculated?
WCAG 2.1 contrast ratio is (L1 + 0.05) / (L2 + 0.05) where L1 and L2 are the relative luminances of the lighter and darker colors. Each channel is gamma-corrected (linearized) before applying coefficients 0.2126·R + 0.7152·G + 0.0722·B. The two formulas weight green most because the human eye is most sensitive to green wavelengths.
What if I need a higher ratio than 9.40:1?
This pair already passes AAA — the strictest WCAG 2.1 tier — for body text. You can safely use it anywhere.

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