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red · warm

#66393d

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

Token name suggestion: Shadow Cardinal

RGB
102, 57, 61
HSL
355°, 28%, 31%
CMYK
0, 44, 40, 60
Luminance
0.0609

#66393d is a dark soft red, 355° on the wheel and 25/100 on the cool side. Put white text on it (9.47:1). As text it scores 9.47:1 on white — safe at any size. Nearest name is Brown, nearest Tailwind family is stone.

hsl(355 28% 31%)rgb(102 57 61)Base step 800AAA inkWarm

At a glance

Every number on this page in one read: what #66393d is made of, how bright it looks, and which way it leans.

Hex
#66393d
Hue
355°
red
Saturation
28%
soft
Lightness
31%
dark
Brightness
40%
HSV value
Perceived
29%
weighted brightness
Luminance
0.0609
WCAG relative
Temperature
Warm
25/100 cool
Color family
Red
Tone
Soft
Best ink
White
9.47:1
Closest name
Brown
ΔE2000 15.8
Chroma
21.4
LCH, 0–130ish
OKLCH L
0.401
perceptual lightness
Tailwind
stone
500 · ΔE 22.8
Web-safe
#663333
nearest of 216
Where it sits
Hue355° of 360°
Saturation28%
Lightness31%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #66393d.

Temperature
Warm ← → Cool25% 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
Red46%
Green48%
Blue6%

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

Every format

HEX#66393d
HEX (8-digit)#66393dff
RGBrgb(102, 57, 61)
RGBArgba(102, 57, 61, 1)
HSLhsl(355, 28%, 31%)
HSV / HSBhsv(355, 44%, 40%)
HWBhwb(355 22% 60%)
CMYKcmyk(0%, 44%, 40%, 60%)
LABlab(29.6 20.4 6.2)
LCHlch(29.6 21.4 16.9)
OKLCHoklch(0.401 0.064 14.6)
XYZ (D65)xyz(7.79, 6.09, 5.18)
Decimal6699325
Display P3color(display-p3 0.400 0.224 0.239)
Web-safe#663333

Copy-ready code

every platformclick to select
/* CSS */
color: #66393d;
background-color: #66393d;
/* CSS custom property */
--brand: #66393d;
/* Tailwind (arbitrary) */
class="text-[#66393d] bg-[#66393d]"
/* SCSS */
$brand: #66393d;
/* SwiftUI */
Color(red: 0.400, green: 0.224, blue: 0.239)
/* UIKit */
UIColor(red: 0.400, green: 0.224, blue: 0.239, alpha: 1)
/* Android XML */
<color name="brand">#66393D</color>
/* Android Compose */
Color(0xFF66393D)
/* Flutter */
Color(0xFF66393D)
/* Python / OpenCV (BGR) */
(61, 57, 102)
/* Python / PIL (RGB) */
(102, 57, 61)
/* Java AWT */
new Color(102, 57, 61)
/* .NET */
Color.FromArgb(255, 102, 57, 61)
/* OpenGL / Unity (0–1) */
(0.4000f, 0.2235f, 0.2392f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{102,57,61}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #66393d 85%, white);
border-color: color-mix(in oklab, #66393d 40%, transparent);
/* theme-aware in one line */
color: light-dark(#522E31, #E9D8D9);
/* relative colour syntax */
--hover: hsl(from #66393d 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: #F9F6F6;
  --brand-100: #F3ECED;
  --brand-200: #E6D6D7;
  --brand-300: #D7B7BA;
  --brand-400: #C39397;
  --brand-500: #AF6F75;
  --brand-600: #9D585E;
  --brand-700: #83494E;
  --brand-800: #66393d;
  --brand-900: #4D2D30;
  --brand-950: #301C1E;
  --brand: #66393d;
  --brand-ink: #ffffff;
  --brand-surface: #FAF5F6;
  --brand-border: #E2CBCD;
  --brand-hover: #4F2C2F;
  --brand-pressed: #381F22;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #241416;
    --brand-ink: #E9D8D9;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F9F6F6',
        100: '#F3ECED',
        200: '#E6D6D7',
        300: '#D7B7BA',
        400: '#C39397',
        500: '#AF6F75',
        600: '#9D585E',
        700: '#83494E',
        800: '#66393d',
        900: '#4D2D30',
        950: '#301C1E',
        DEFAULT: '#66393d',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F9F6F6,
  '100': #F3ECED,
  '200': #E6D6D7,
  '300': #D7B7BA,
  '400': #C39397,
  '500': #AF6F75,
  '600': #9D585E,
  '700': #83494E,
  '800': #66393d,
  '900': #4D2D30,
  '950': #301C1E,
);
$brand-base: #66393d;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F9F6F6", "$type": "color" },
      "100": { "$value": "#F3ECED", "$type": "color" },
      "200": { "$value": "#E6D6D7", "$type": "color" },
      "300": { "$value": "#D7B7BA", "$type": "color" },
      "400": { "$value": "#C39397", "$type": "color" },
      "500": { "$value": "#AF6F75", "$type": "color" },
      "600": { "$value": "#9D585E", "$type": "color" },
      "700": { "$value": "#83494E", "$type": "color" },
      "800": { "$value": "#66393d", "$type": "color" },
      "900": { "$value": "#4D2D30", "$type": "color" },
      "950": { "$value": "#301C1E", "$type": "color" }
    },
    "brandInk": { "$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 #66393d · 9.47:1
Use #ffffffAAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 9.47:1 · recommended
AA pass · AA large pass · AAA pass
Aa
Black text · 2.22:1
AA fail · AA large fail · AAA fail
Reading the other direction: #66393d as text scores 9.47:1 on white and 2.22:1 on black.
Best tinted ink on it, if plain black or white feels flat: #F6EFEF at 8.35:1.

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
#66393d · 9.47:1
AA on whitealready passes
#66393d
The quick fox
#66393d · 9.47:1
AAA on whitealready passes
#66393d
The quick fox
#A86369 · 4.65:1
AA on black+21% L
#A86369
The quick fox
#BE8A8E · 7.22:1
AAA on black+33% L
#BE8A8E

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #66393D 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
#66393d on white: 9.47:1
AA ✓ pass · AA-large · AAA
Aa
#66393d on black: 2.22:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #66393d as text on that neutral, and that neutral as text on #66393d.

NeutralRatioBoth directions
White9.47:1AaAa
Slate 509.05:1AaAa
Slate 1008.64:1AaAa
Slate 2007.68:1AaAa
Slate 3006.38:1AaAa
Slate 4003.69:1AaAa
Slate 5001.99:1AaAa
Slate 6001.25:1AaAa
Slate 7001.09:1AaAa
Slate 8001.54:1AaAa
Slate 9001.89:1AaAa
Black2.22:1AaAa
Colour vision deficiency
true color
protanopia · #42403D
deuteranopia · #4D493C
tritanopia · #6E343B

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. #66393d is pinned to step 800; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F9F6F6
#F3ECED
#E6D6D7
#D7B7BA
#C39397
#AF6F75
#9D585E
#83494E
#66393d
#4D2D30
#301C1E
Base = 800Lightest = 50 · #F9F6F6Darkest = 950 · #301C1EText 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 0.016 14.6);
  --brand-100: oklch(0.94 0.026 14.6);
  --brand-200: oklch(0.88 0.038 14.6);
  --brand-300: oklch(0.80 0.050 14.6);
  --brand-400: oklch(0.72 0.059 14.6);
  --brand-500: oklch(0.64 0.064 14.6);
  --brand-600: oklch(0.56 0.064 14.6);
  --brand-700: oklch(0.48 0.060 14.6);
  --brand-800: oklch(0.40 0.054 14.6);
  --brand-900: oklch(0.32 0.045 14.6);
  --brand-950: oklch(0.24 0.035 14.6);
}

Colors that work with #66393d

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#FAF5F6
Tinted page background
Border#E2CBCD
Hairlines and dividers
Muted text#935258
Captions on the surface
Accent#366958
Second voice, not a rival
Dark variant#522E31
Hover, pressed, headers
Light variant#F6EFEF
Selected rows, tints
Dark surface#241416
Dark-mode background
Hover#4F2C2F
One step down in lightness
Pressed#381F22
Two steps down
Disabled#A26D72
Chroma pulled out
Focus ring#7C373D
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 #66393d

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

Works well for
  • Body text and links on white
  • Charts, tags and secondary surfaces
  • Headers, footers and dark-mode surfaces
  • Brand accents, badges and data highlights
Use with care
  • Text on black or near-black surfaces
  • 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.

The muted chroma softens the association — it reads considered rather than loud, which suits long-form and data-heavy screens. 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
  • Weight69/100
  • 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#396662
Analogous left#663954
Analogous right#664C39
Split-complement 1#39664C
Split-complement 2#395466
Triadic 1#3D6639
Triadic 2#393D66
Tetradic#546639
On the wheel
Base+30°−30°+120°+240°+180°355°

#66393d sits at 355°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red40.0%
Green22.4%
Blue23.9%
R · 0–255
102
0x66
G · 0–255
57
0x39
B · 0–255
61
0x3d

CMYK percentages

Cyan0.0%
Magenta44.1%
Yellow40.2%
Key (black)60.0%

Total ink coverage is 144%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#66393d text on a black background

contrast 2.22:1

Card sample

#66393d text on a white background

contrast 9.47:1

Card sample

#66393d on grey

8.64:1

#66393d on its own surface

8.77:1

#66393d on its dark surface

1.87:1

CSS3 live lab

Text font color

The quick brown fox

color: #66393d;
Background color
Panel with #66393d background
background-color: #66393d;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #66393d;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(102, 57, 61, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(102, 57, 61, 0.45);
Border & gradient
Gradient panel
border: 3px solid #66393d;
background: linear-gradient(135deg, #66393d, #665339);
Gradient text

Gradient headline

background: linear-gradient(90deg, #66393d, #665E39);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #66393d;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #66393d;
caret-color: #66393d;
Left rule
Pull quote or callout
border-left: 4px solid #66393d;
Ring + tint
Selected chip
background: #F6EFEF;
box-shadow: inset 0 0 0 2px #66393d;
Conic badge
68%
background: conic-gradient(#66393d 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #66393d 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(102, 57, 61, 0.5)
rgb(102 57 61 / 50%)
#66393d80
hsl(355 28% 31% / 50%)
color-mix(in srgb, #66393d 50%, transparent)
Alpha8-digit hexFlat on white
10%#66393d1a#F0EBEC
20%#66393d33#E0D7D8
40%#66393d66#C2B0B1
60%#66393d99#A3888B
80%#66393dcc#856164

Gradients from #66393d

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, #8D4F54, #66393d 45%, #522E31);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #66393d, #52462E);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #66393d, #396662);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #A15A60 0%, #66393d 45%, #522E31 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #FAF5F6, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #874B73 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #7A5F44 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #522E31 0%, transparent 65%), #66393d;

Monochromatic scale

Palettes built from #66393d

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.

#66393d 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 2.22:1 — lift it to #A86369 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.

#66393d, answered

What color is #66393d?

#66393d is a dark soft red, closest to Brown (ΔE2000 15.8). It sits at 355° on the hue wheel with 28% saturation and 31% lightness, which reads as warm.

What is the RGB value of #66393d?

rgb(102, 57, 61) — 102 red, 57 green and 61 blue out of 255, or 40% / 22.4% / 23.9% by channel.

What is #66393d in HSL and HSV?

hsl(355, 28%, 31%) and hsv(355, 44%, 40%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #66393d a light or a dark color?

It is a dark color. Relative luminance is 0.0609 and perceived brightness is 29%, so white text on it reaches 9.47:1.

Should I use black or white text on #66393d?

White. It scores 9.47:1 against #66393d, versus 2.22:1 for black — AAA at any size.

Is #66393d accessible on a white background?

#66393d on white scores 9.47:1, which clears AAA at every size.

What is the complementary color of #66393d?

#396662 sits directly opposite on the wheel. Softer options are the split-complements #39664C and #395466, which give the same contrast with far less vibration.

What colors go well with #66393d?

For interface work: #FAF5F6 as the surface, #E2CBCD for borders, #935258 for secondary text, #366958 as an accent and #522E31 for hover and pressed states. For a palette, the analogous pair #663954 and #664C39 stays calm, while #396662 is the loudest partner.

What is #66393d in CMYK for printing?

cmyk(0%, 44%, 40%, 60%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #66393d warm or cool?

Warm — it scores 25 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #664639; nudged cooler, #68374D.

Which Tailwind color is closest to #66393d?

The stone family — its 500 step is #78716c, ΔE2000 22.8 away. That is a visible difference, so define #66393d as a custom token rather than reaching for the built-in.

How do I use #66393d in Tailwind CSS?

Inline it as an arbitrary value with bg-[#66393d] or text-[#66393d], 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 #66393d with 50% opacity?

rgba(102, 57, 61, 0.5), or #66393d80 in eight-digit hex. Over white that composites to #B39C9E; over black, #331D1F.

Is #66393d a web-safe color?

No. The nearest web-safe colour is #663333, ΔE2000 3.1 away. The palette only matters for legacy displays and some email clients now.

What does the color #66393d 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 moderate chroma the association is present but not shouted.

What gradient works with #66393d?

The safest is same-hue elevation: linear-gradient(135deg, #8D4F54, #66393d 45%, #522E31). For more colour, a short hue run to #52462E keeps it rich without turning muddy.

Work with #66393d in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #66393d at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.