Is #BF6437 accessible for body text on white?

#BF6437 has a contrast ratio of 4.12:1 against white, which is not sufficient for WCAG AA body text (4.5:1).

What is the complementary color of #BF6437?

The complement of #BF6437 is #3792BF.

#BF6437 Sienna

rgb(191, 100, 55)

Color conversions

HEX: #BF6437
RGB: rgb(191, 100, 55)
RGBA: rgba(191, 100, 55, 1)
HSL: hsl(20, 55%, 48%)
HSV / HSB: hsv(20, 71%, 75%)
CMYK: cmyk(0%, 48%, 71%, 25%)

Wide-gamut spaces

XYZ: xyz(26.735, 20.47, 6.157)
LAB: lab(52.36 32.93 41.1)
LCH: lch(52.36 52.67 51.3)
OKLAB: oklab(60.17% 0.0918 0.0931)
OKLCH: oklch(60.17% 0.1308 45.39)
Nearest name: Sienna

Shades, tints and tones

Shades

Tints

Tones

Color harmonies

Complementary

The hue directly opposite on the color wheel. Maximum contrast, ideal for a single accent against a dominant brand color.

Analogous

Neighbouring hues that share a temperature. The safest harmony for calm, cohesive interfaces.

Triadic

Three hues evenly spaced 120 degrees apart. Vibrant and balanced — use one as dominant and the other two sparingly.

Split Complementary

The complement split into two adjacent hues. Nearly the contrast of complementary with noticeably less tension.

Square (Tetradic)

Four hues at 90-degree intervals. A rich set for illustration, data visualisation, and category coding.

Rectangle (Tetradic)

Two complementary pairs offset by 60 degrees. Gives two warm and two cool options in one system.

Monochromatic

A single hue across five lightness levels. The foundation of most UI scales and the most accessible starting point.

Similar colors

Closest matches

Opacity variations

#bf64371a

#bf643733

#bf64374d

#bf643766

#bf643780

#bf643799

#bf6437b3

#bf6437cc

#bf6437e6

#bf6437ff

On white

4.12:1

Body text AA Large · Large text AA

On black

5.09:1

Body text AA · Large text AA

White-on-color contrast is 4.12:1.

Color blindness preview

Protanopia

No red cones — ~1% of men

Protanomaly

Reduced red sensitivity — ~1% of men

Deuteranopia

No green cones — ~1% of men

Deuteranomaly

Reduced green sensitivity — ~5% of men

Tritanopia

No blue cones — very rare

Tritanomaly

Reduced blue sensitivity — very rare

Achromatopsia

No color perception — ~1 in 30,000

Achromatomaly

Partial color perception — rare

Meaning, psychology and brand usage

Friendly energy without red's alarm

Orange reads as enthusiastic and affordable. It converts well on calls to action because it is highly visible yet lacks red's threat association. At low saturation it becomes terracotta and shifts from playful to crafted and earthy.

Associated with harvest, warmth, and creativity in Western markets, and with sacred devotion in India where saffron carries religious weight.

The colour had no English name until the fruit arrived in the sixteenth century — before that it was 'geoluread', yellow-red. Modern brand orange owes its ubiquity to inexpensive azo pigments.

Strong for developer tools, logistics, and value-focused consumer brands. Pair with a dark neutral rather than another warm hue to avoid a Halloween reading.

Common industries: Technology, Logistics, Fitness, Construction, Family retail. Pairs well with deep teal for balance, off-black for contrast, sand for a natural palette.

Code exports

CSS

:root {
  --color-sienna: #bf6437;
  --color-sienna-rgb: 191 100 55;
  --color-sienna-hsl: 20 55% 48%;
  --color-sienna-oklch: 60.17% 0.1308 45.39;
}

.element {
  color: #bf6437;
  background-color: hsl(20, 55%, 48%);
  border: 1px solid rgb(191 100 55 / 40%);
}

SCSS

$sienna: #bf6437;
$sienna-light: #dfb29b;
$sienna-dark: #60321c;

.element {
  color: $sienna;
  background: rgba($sienna, 0.12);

  &:hover {
    color: darken($sienna, 8%);
  }
}

LESS

@sienna: #bf6437;
@sienna-light: lighten(@sienna, 12%);
@sienna-dark: darken(@sienna, 12%);

.element {
  color: @sienna;
  background: fade(@sienna, 12%);
}

Tailwind CSS

/* Tailwind v4 — src/styles.css */
@theme {
  --color-sienna-50: #f2e0d7;
  --color-sienna-100: #ecd1c3;
  --color-sienna-200: #e5c1af;
  --color-sienna-300: #d9a287;
  --color-sienna-400: #cc835f;
  --color-sienna-500: #bf6437;
  --color-sienna-600: #ac5a32;
  --color-sienna-700: #864627;
  --color-sienna-800: #60321c;
  --color-sienna-900: #391e11;
}

/* Usage */
<div class="bg-sienna-500 text-sienna-50 ring-sienna-600" />

/* Arbitrary value, no config needed */
<div class="bg-[#bf6437]" />

Bootstrap

// Bootstrap 5 — _variables.scss (before importing bootstrap)
$sienna: #bf6437;
$primary: $sienna;

$theme-colors: map-merge($theme-colors, (
  "sienna": $sienna
));

// Generates .text-sienna, .bg-sienna, .btn-sienna
@import "bootstrap/scss/bootstrap";

Flutter

import 'package:flutter/material.dart';

const Color sienna = Color(0xFFBF6437);

// As a MaterialColor swatch
const MaterialColor siennaSwatch = MaterialColor(0xFFBF6437, <int, Color>{
  50: Color(0xFFF2E0D7),
  100: Color(0xFFECD1C3),
  200: Color(0xFFE5C1AF),
  300: Color(0xFFD9A287),
  400: Color(0xFFCC835F),
  500: Color(0xFFBF6437),
  600: Color(0xFFAC5A32),
  700: Color(0xFF864627),
  800: Color(0xFF60321C),
  900: Color(0xFF391E11),
});

Swift / SwiftUI

import SwiftUI

extension Color {
    /// #bf6437 — Sienna
    static let sienna = Color(
        red: 0.749,
        green: 0.3922,
        blue: 0.2157
    )
}

// UIKit
extension UIColor {
    static let sienna = UIColor(
        red: 0.749,
        green: 0.3922,
        blue: 0.2157,
        alpha: 1.0
    )
}

Android

<!-- res/values/colors.xml -->
<resources>
    <color name="sienna">#BF6437</color>
    <color name="sienna_translucent">#80BF6437</color>
</resources>

<!-- Jetpack Compose -->
val Sienna = Color(0xFFBF6437)

JavaScript

export const SIENNA = {
  hex: "#bf6437",
  rgb: [191, 100, 55],
  hsl: [20, 55, 48],
  oklch: "oklch(60.17% 0.1308 45.39)",
};

JSON tokens

{
  "$schema": "https://design-tokens.org/schema.json",
  "sienna": {
    "$type": "color",
    "$value": "#bf6437",
    "$description": "Sienna — generated by ColorVerse AI"
  }
}