Contrast Check: #FF5733 on #FFFFFF

Vibrant orange (#FF5733) on White (#FFFFFF) — 3.15:1, passes AA large.

At a glance

Contrast ratio
3.15:1
WCAG AA (normal text)
Fail
WCAG AA (large text)
Pass
WCAG AAA (normal text)
Fail
UI components / non-text
Pass

Vibrant orange text on a white background is one of the most frequently checked combinations in web design. The measured WCAG 2.1 contrast ratio is 3.15:1. It passes WCAG AA only for large text (18pt+ or 14pt+ bold), not for body text. Orange-red on white sits in the awkward middle of the contrast spectrum — passes AA large only.

Frequently asked questions

Is #FF5733 on #FFFFFF accessible?
For WCAG 2.1 AA — the most common conformance target — the answer is no for normal-size body text. Normal text needs 4.5:1 and this combination measures 3.15:1. 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 falls short of that bar.
Where is this combination commonly used?
Brand accents, decorative headings, illustrations (avoid for body text).
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 3.15:1?
Adjust either the foreground or background lightness in the calculator above. The Suggestions panel automatically computes the nearest passing color in each direction (lighter or darker) for AA and AAA targets.

Related Tools

palette

Color Palette

Extract colors from images or generate harmonious palettes.

blur_on

Color Gradient Test

Test your monitor for color banding and 8-bit vs 10-bit depth with smooth gradients across grayscale, red, green, blue, and hue channels.

gradient

CSS Gradient

Visual CSS background generator & code.

draw

Logo Maker

Design logos with a drag-and-drop canvas editor. Add text, icons, and shapes — export PNG, SVG, or ZIP.

style

CSS Cheatsheet

Quick reference for CSS selectors, Flexbox, Grid, typography, animations, and modern CSS. Search and copy instantly.