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red · warm

#b91f39

a dark, vivid red · warm · closest name: Brown

Token name suggestion: Shadow Cherry

RGB
185, 31, 57
HSL
350°, 71%, 42%
CMYK
0, 83, 69, 28
Luminance
0.1159

#b91f39 is a dark vivid red, 350° on the wheel and 22/100 on the cool side. Put white text on it (6.33:1). As text it scores 6.33:1 on white — safe at any size. Nearest name is Brown, nearest Tailwind family is red.

hsl(350 71% 42%)rgb(185 31 57)Base step 700AA inkWarm

At a glance

Every number on this page in one read: what #b91f39 is made of, how bright it looks, and which way it leans.

Hex
#b91f39
Hue
350°
red
Saturation
71%
vivid
Lightness
42%
dark
Brightness
73%
HSV value
Perceived
41%
weighted brightness
Luminance
0.1159
WCAG relative
Temperature
Warm
22/100 cool
Color family
Red
Tone
Vivid
Best ink
White
6.33:1
Closest name
Brown
ΔE2000 5.8
Chroma
65.0
LCH, 0–130ish
OKLCH L
0.511
perceptual lightness
Tailwind
red
500 · ΔE 15.3
Web-safe
#CC3333
nearest of 216
Where it sits
Hue350° of 360°
Saturation71%
Lightness42%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #b91f39.

Temperature
Warm ← → Cool22% cool

Reads warm. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red89%
Green8%
Blue3%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#b91f39
HEX (8-digit)#b91f39ff
RGBrgb(185, 31, 57)
RGBArgba(185, 31, 57, 1)
HSLhsl(350, 71%, 42%)
HSV / HSBhsv(350, 83%, 73%)
HWBhwb(350 12% 27%)
CMYKcmyk(0%, 83%, 69%, 28%)
LABlab(40.6 59.6 25.9)
LCHlch(40.6 65.0 23.5)
OKLCHoklch(0.511 0.186 19.0)
XYZ (D65)xyz(21.24, 11.59, 4.99)
Decimal12132153
Display P3color(display-p3 0.725 0.122 0.224)
Web-safe#CC3333

Copy-ready code

every platformclick to select
/* CSS */
color: #b91f39;
background-color: #b91f39;
/* CSS custom property */
--brand: #b91f39;
/* Tailwind (arbitrary) */
class="text-[#b91f39] bg-[#b91f39]"
/* SCSS */
$brand: #b91f39;
/* SwiftUI */
Color(red: 0.725, green: 0.122, blue: 0.224)
/* UIKit */
UIColor(red: 0.725, green: 0.122, blue: 0.224, alpha: 1)
/* Android XML */
<color name="brand">#B91F39</color>
/* Android Compose */
Color(0xFFB91F39)
/* Flutter */
Color(0xFFB91F39)
/* Python / OpenCV (BGR) */
(57, 31, 185)
/* Python / PIL (RGB) */
(185, 31, 57)
/* Java AWT */
new Color(185, 31, 57)
/* .NET */
Color.FromArgb(255, 185, 31, 57)
/* OpenGL / Unity (0–1) */
(0.7255f, 0.1216f, 0.2235f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{185,31,57}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #b91f39 85%, white);
border-color: color-mix(in oklab, #b91f39 40%, transparent);
/* theme-aware in one line */
color: light-dark(#6D1222, #EED3D7);
/* relative colour syntax */
--hover: hsl(from #b91f39 h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #FCF3F5;
  --brand-100: #F8E7EA;
  --brand-200: #F3C9D0;
  --brand-300: #EF9FAC;
  --brand-400: #E76F83;
  --brand-500: #DF3F5A;
  --brand-600: #D22341;
  --brand-700: #b91f39;
  --brand-800: #8C172B;
  --brand-900: #651523;
  --brand-950: #3F0D16;
  --brand: #b91f39;
  --brand-ink: #ffffff;
  --brand-surface: #FAF4F5;
  --brand-border: #EDC0C7;
  --brand-hover: #9B1A30;
  --brand-pressed: #7C1526;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #241416;
    --brand-ink: #EED3D7;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FCF3F5',
        100: '#F8E7EA',
        200: '#F3C9D0',
        300: '#EF9FAC',
        400: '#E76F83',
        500: '#DF3F5A',
        600: '#D22341',
        700: '#b91f39',
        800: '#8C172B',
        900: '#651523',
        950: '#3F0D16',
        DEFAULT: '#b91f39',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FCF3F5,
  '100': #F8E7EA,
  '200': #F3C9D0,
  '300': #EF9FAC,
  '400': #E76F83,
  '500': #DF3F5A,
  '600': #D22341,
  '700': #b91f39,
  '800': #8C172B,
  '900': #651523,
  '950': #3F0D16,
);
$brand-base: #b91f39;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#FCF3F5", "$type": "color" },
      "100": { "$value": "#F8E7EA", "$type": "color" },
      "200": { "$value": "#F3C9D0", "$type": "color" },
      "300": { "$value": "#EF9FAC", "$type": "color" },
      "400": { "$value": "#E76F83", "$type": "color" },
      "500": { "$value": "#DF3F5A", "$type": "color" },
      "600": { "$value": "#D22341", "$type": "color" },
      "700": { "$value": "#b91f39", "$type": "color" },
      "800": { "$value": "#8C172B", "$type": "color" },
      "900": { "$value": "#651523", "$type": "color" },
      "950": { "$value": "#3F0D16", "$type": "color" }
    },
    "brandInk": { "$value": "#ffffff", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#ffffff on #b91f39 · 6.33:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 6.33:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.32:1
AA fail · AA large pass · AAA fail
Reading the other direction: #b91f39 as text scores 6.33:1 on white and 3.32:1 on black.
Best tinted ink on it, if plain black or white feels flat: #FBE9EC at 5.42:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#b91f39 · 6.33:1
AA on whitealready passes
#b91f39
The quick fox
#AC1D35 · 7.04:1
AAA on white−3% L
#AC1D35
The quick fox
#DC2F4C · 4.55:1
AA on black+10% L
#DC2F4C
The quick fox
#E77185 · 7.10:1
AAA on black+25% L
#E77185

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #B91F39 is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#b91f39 on white: 6.33:1
AA ✓ pass · AA-large · AAA
Aa
#b91f39 on black: 3.32:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #b91f39 as text on that neutral, and that neutral as text on #b91f39.

NeutralRatioBoth directions
White6.33:1AaAa
Slate 506.05:1AaAa
Slate 1005.78:1AaAa
Slate 2005.13:1AaAa
Slate 3004.26:1AaAa
Slate 4002.47:1AaAa
Slate 5001.33:1AaAa
Slate 6001.20:1AaAa
Slate 7001.64:1AaAa
Slate 8002.31:1AaAa
Slate 9002.82:1AaAa
Black3.32:1AaAa
Colour vision deficiency
true color
protanopia · #504B39
deuteranopia · #766B34
tritanopia · #CC002B

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #b91f39 is pinned to step 700; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#FCF3F5
#F8E7EA
#F3C9D0
#EF9FAC
#E76F83
#DF3F5A
#D22341
#b91f39
#8C172B
#651523
#3F0D16
Base = 700Lightest = 50 · #FCF3F5Darkest = 950 · #3F0D16Text step on white = 600
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.047 19.0);
  --brand-100: oklch(0.94 0.075 19.0);
  --brand-200: oklch(0.88 0.112 19.0);
  --brand-300: oklch(0.80 0.145 19.0);
  --brand-400: oklch(0.72 0.171 19.0);
  --brand-500: oklch(0.64 0.186 19.0);
  --brand-600: oklch(0.56 0.186 19.0);
  --brand-700: oklch(0.48 0.175 19.0);
  --brand-800: oklch(0.40 0.157 19.0);
  --brand-900: oklch(0.32 0.130 19.0);
  --brand-950: oklch(0.24 0.103 19.0);
}

Colors that work with #b91f39

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#ffffff
White wins here
Surface#FAF4F5
Tinted page background
Border#EDC0C7
Hairlines and dividers
Muted text#9B4B58
Captions on the surface
Accent#19B372
Second voice, not a rival
Dark variant#6D1222
Hover, pressed, headers
Light variant#FBE9EC
Selected rows, tints
Dark surface#241416
Dark-mode background
Hover#9B1A30
One step down in lightness
Pressed#7C1526
Two steps down
Disabled#B89097
Chroma pulled out
Focus ring#D71637
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #b91f39

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Body text and links on white
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Headers, footers and dark-mode surfaces
  • Brand accents, badges and data highlights
Use with care
  • Full-page backgrounds — tiring over long sessions
  • Black text placed on it
  • Status meaning — pair it with an icon or label, never colour alone
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Any size
Safe as a fill behind white type
Yes
Safe as a 1px border on white
Yes

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

urgentappetisingboldphysical

Red arrives before the rest of the page does. It raises attention and appetite, which is why it runs food, sport and clearance pricing.

This is a confident chroma: strong enough to lead a brand, restrained enough to live in an interface all day. The low lightness adds weight and formality.

Worth knowing

It is also the universal error colour. Use it as a brand accent and users may read a warning that is not there.

Reads as
  • FormalityHigh
  • EnergyMedium-high
  • Weight58/100
  • TemperatureWarm
  • ApproachabilityHigh

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#1FB99F
Analogous left#B91F86
Analogous right#B9521F
Split-complement 1#1FB952
Split-complement 2#1F86B9
Triadic 1#39B91F
Triadic 2#1F39B9
Tetradic#86B91F
On the wheel
Base+30°−30°+120°+240°+180°350°

#b91f39 sits at 350°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red72.5%
Green12.2%
Blue22.4%
R · 0–255
185
0xb9
G · 0–255
31
0x1f
B · 0–255
57
0x39

CMYK percentages

Cyan0.0%
Magenta83.2%
Yellow69.2%
Key (black)27.5%

Total ink coverage is 180%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#b91f39 text on a black background

contrast 3.32:1

Card sample

#b91f39 text on a white background

contrast 6.33:1

Card sample

#b91f39 on grey

5.78:1

#b91f39 on its own surface

5.82:1

#b91f39 on its dark surface

2.80:1

CSS3 live lab

Text font color

The quick brown fox

color: #b91f39;
Background color
Panel with #b91f39 background
background-color: #b91f39;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #b91f39;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(185, 31, 57, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(185, 31, 57, 0.45);
Border & gradient
Gradient panel
border: 3px solid #b91f39;
background: linear-gradient(135deg, #b91f39, #B96C1F);
Gradient text

Gradient headline

background: linear-gradient(90deg, #b91f39, #B9921F);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #b91f39;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #b91f39;
caret-color: #b91f39;
Left rule
Pull quote or callout
border-left: 4px solid #b91f39;
Ring + tint
Selected chip
background: #FBE9EC;
box-shadow: inset 0 0 0 2px #b91f39;
Conic badge
68%
background: conic-gradient(#b91f39 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #b91f39 over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(185, 31, 57, 0.5)
rgb(185 31 57 / 50%)
#b91f3980
hsl(350 71% 42% / 50%)
color-mix(in srgb, #b91f39 50%, transparent)
Alpha8-digit hexFlat on white
10%#b91f391a#F8E9EB
20%#b91f3933#F1D2D7
40%#b91f3966#E3A5B0
60%#b91f3999#D57988
80%#b91f39cc#C74C61

Gradients from #b91f39

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #DE3854, #b91f39 45%, #6D1222);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #b91f39, #9F681B);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #b91f39, #1FB99F);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #E2526A 0%, #b91f39 45%, #6D1222 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #FAF4F5, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #DC2FB1 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #D36C23 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #6D1222 0%, transparent 65%), #b91f39;

Monochromatic scale

Palettes built from #b91f39

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#b91f39 in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
Food and drinkEntertainmentRetailSport
Common UI roles
ButtonsLinksFocus statesCharts
Print note

Converts to four-color process without much drama. Proof it anyway.

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Too dim on dark surfaces at 3.32:1 — lift it to #DC2F4C for body text, or reserve it for fills.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#b91f39, answered

What color is #b91f39?

#b91f39 is a dark vivid red, closest to Brown (ΔE2000 5.8). It sits at 350° on the hue wheel with 71% saturation and 42% lightness, which reads as warm.

What is the RGB value of #b91f39?

rgb(185, 31, 57) — 185 red, 31 green and 57 blue out of 255, or 72.5% / 12.2% / 22.4% by channel.

What is #b91f39 in HSL and HSV?

hsl(350, 71%, 42%) and hsv(350, 83%, 73%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #b91f39 a light or a dark color?

It is a dark color. Relative luminance is 0.1159 and perceived brightness is 41%, so white text on it reaches 6.33:1.

Should I use black or white text on #b91f39?

White. It scores 6.33:1 against #b91f39, versus 3.32:1 for black — AA at any size.

Is #b91f39 accessible on a white background?

#b91f39 on white scores 6.33:1, which clears AA at every size but not AAA.

What is the complementary color of #b91f39?

#1FB99F sits directly opposite on the wheel. Softer options are the split-complements #1FB952 and #1F86B9, which give the same contrast with far less vibration.

What colors go well with #b91f39?

For interface work: #FAF4F5 as the surface, #EDC0C7 for borders, #9B4B58 for secondary text, #19B372 as an accent and #6D1222 for hover and pressed states. For a palette, the analogous pair #B91F86 and #B9521F stays calm, while #1FB99F is the loudest partner.

What is #b91f39 in CMYK for printing?

cmyk(0%, 83%, 69%, 28%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #b91f39 warm or cool?

Warm — it scores 22 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #B93E1F; nudged cooler, #BB1D72.

Which Tailwind color is closest to #b91f39?

The red family — its 500 step is #ef4444, ΔE2000 15.3 away. That is a visible difference, so define #b91f39 as a custom token rather than reaching for the built-in.

How do I use #b91f39 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#b91f39] or text-[#b91f39], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #b91f39 with 50% opacity?

rgba(185, 31, 57, 0.5), or #b91f3980 in eight-digit hex. Over white that composites to #DC8F9C; over black, #5D101D.

Is #b91f39 a web-safe color?

No. The nearest web-safe colour is #CC3333, ΔE2000 7.7 away. The palette only matters for legacy displays and some email clients now.

What does the color #b91f39 mean?

As a red, it reads urgent, appetising, bold. Red arrives before the rest of the page does. It raises attention and appetite, which is why it runs food, sport and clearance pricing. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #b91f39?

The safest is same-hue elevation: linear-gradient(135deg, #DE3854, #b91f39 45%, #6D1222). For more colour, a short hue run to #9F681B keeps it rich without turning muddy.

Work with #b91f39 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #b91f39 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.