Skip to content
red · warm

#821528

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

Token name suggestion: Dusk Cardinal

RGB
130, 21, 40
HSL
350°, 72%, 30%
CMYK
0, 84, 69, 49
Luminance
0.0544

#821528 is a dark vivid red, 350° on the wheel and 22/100 on the cool side. Put white text on it (10.06:1). As text it scores 10.06:1 on white — safe at any size. Nearest name is Brown, nearest Tailwind family is red.

hsl(350 72% 30%)rgb(130 21 40)Base step 800AAA inkWarm

At a glance

Every number on this page in one read: what #821528 is made of, how bright it looks, and which way it leans.

Hex
#821528
Hue
350°
red
Saturation
72%
vivid
Lightness
30%
dark
Brightness
51%
HSV value
Perceived
29%
weighted brightness
Luminance
0.0544
WCAG relative
Temperature
Warm
22/100 cool
Color family
Red
Tone
Vivid
Best ink
White
10.06:1
Closest name
Brown
ΔE2000 9.6
Chroma
49.2
LCH, 0–130ish
OKLCH L
0.397
perceptual lightness
Tailwind
red
500 · ΔE 25.8
Web-safe
#990033
nearest of 216
Where it sits
Hue350° of 360°
Saturation72%
Lightness30%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #821528.

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
Red87%
Green10%
Blue3%

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

Every format

HEX#821528
HEX (8-digit)#821528ff
RGBrgb(130, 21, 40)
RGBArgba(130, 21, 40, 1)
HSLhsl(350, 72%, 30%)
HSV / HSBhsv(350, 84%, 51%)
HWBhwb(350 8% 49%)
CMYKcmyk(0%, 84%, 69%, 49%)
LABlab(27.9 45.5 18.6)
LCHlch(27.9 49.2 22.3)
OKLCHoklch(0.397 0.142 18.0)
XYZ (D65)xyz(9.86, 5.44, 2.54)
Decimal8525096
Display P3color(display-p3 0.510 0.082 0.157)
Web-safe#990033

Copy-ready code

every platformclick to select
/* CSS */
color: #821528;
background-color: #821528;
/* CSS custom property */
--brand: #821528;
/* Tailwind (arbitrary) */
class="text-[#821528] bg-[#821528]"
/* SCSS */
$brand: #821528;
/* SwiftUI */
Color(red: 0.510, green: 0.082, blue: 0.157)
/* UIKit */
UIColor(red: 0.510, green: 0.082, blue: 0.157, alpha: 1)
/* Android XML */
<color name="brand">#821528</color>
/* Android Compose */
Color(0xFF821528)
/* Flutter */
Color(0xFF821528)
/* Python / OpenCV (BGR) */
(40, 21, 130)
/* Python / PIL (RGB) */
(130, 21, 40)
/* Java AWT */
new Color(130, 21, 40)
/* .NET */
Color.FromArgb(255, 130, 21, 40)
/* OpenGL / Unity (0–1) */
(0.5098f, 0.0824f, 0.1569f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{130,21,40}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #821528 85%, white);
border-color: color-mix(in oklab, #821528 40%, transparent);
/* theme-aware in one line */
color: light-dark(#6E1222, #EED3D7);
/* relative colour syntax */
--hover: hsl(from #821528 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: #EF9EAD;
  --brand-400: #E86E83;
  --brand-500: #E03E5A;
  --brand-600: #D32241;
  --brand-700: #B01C36;
  --brand-800: #821528;
  --brand-900: #661523;
  --brand-950: #400D16;
  --brand: #821528;
  --brand-ink: #ffffff;
  --brand-surface: #FAF4F5;
  --brand-border: #EDC0C8;
  --brand-hover: #63101F;
  --brand-pressed: #450B15;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #241417;
    --brand-ink: #EED3D7;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FCF3F5',
        100: '#F8E7EA',
        200: '#F3C9D0',
        300: '#EF9EAD',
        400: '#E86E83',
        500: '#E03E5A',
        600: '#D32241',
        700: '#B01C36',
        800: '#821528',
        900: '#661523',
        950: '#400D16',
        DEFAULT: '#821528',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FCF3F5,
  '100': #F8E7EA,
  '200': #F3C9D0,
  '300': #EF9EAD,
  '400': #E86E83,
  '500': #E03E5A,
  '600': #D32241,
  '700': #B01C36,
  '800': #821528,
  '900': #661523,
  '950': #400D16,
);
$brand-base: #821528;
$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": "#EF9EAD", "$type": "color" },
      "400": { "$value": "#E86E83", "$type": "color" },
      "500": { "$value": "#E03E5A", "$type": "color" },
      "600": { "$value": "#D32241", "$type": "color" },
      "700": { "$value": "#B01C36", "$type": "color" },
      "800": { "$value": "#821528", "$type": "color" },
      "900": { "$value": "#661523", "$type": "color" },
      "950": { "$value": "#400D16", "$type": "color" }
    },
    "brandInk": { "$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 #821528 · 10.06:1
Use #ffffffAAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 10.06:1 · recommended
AA pass · AA large pass · AAA pass
Aa
Black text · 2.09:1
AA fail · AA large fail · AAA fail
Reading the other direction: #821528 as text scores 10.06:1 on white and 2.09:1 on black.
Best tinted ink on it, if plain black or white feels flat: #FBE9EC at 8.61:1.

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
#821528 · 10.06:1
AA on whitealready passes
#821528
The quick fox
#821528 · 10.06:1
AAA on whitealready passes
#821528
The quick fox
#DD2A4A · 4.50:1
AA on black+22% L
#DD2A4A
The quick fox
#E87186 · 7.14:1
AAA on black+38% L
#E87186

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #821528 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
#821528 on white: 10.06:1
AA ✓ pass · AA-large · AAA
Aa
#821528 on black: 2.09:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #821528 as text on that neutral, and that neutral as text on #821528.

NeutralRatioBoth directions
White10.06:1AaAa
Slate 509.62:1AaAa
Slate 1009.18:1AaAa
Slate 2008.16:1AaAa
Slate 3006.78:1AaAa
Slate 4003.92:1AaAa
Slate 5002.11:1AaAa
Slate 6001.33:1AaAa
Slate 7001.03:1AaAa
Slate 8001.45:1AaAa
Slate 9001.77:1AaAa
Black2.09:1AaAa
Colour vision deficiency
true color
protanopia · #363328
deuteranopia · #524A25
tritanopia · #8F001E

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. #821528 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.

#FCF3F5
#F8E7EA
#F3C9D0
#EF9EAD
#E86E83
#E03E5A
#D32241
#B01C36
#821528
#661523
#400D16
Base = 800Lightest = 50 · #FCF3F5Darkest = 950 · #400D16Text 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 0.036 18.0);
  --brand-100: oklch(0.94 0.057 18.0);
  --brand-200: oklch(0.88 0.085 18.0);
  --brand-300: oklch(0.80 0.111 18.0);
  --brand-400: oklch(0.72 0.131 18.0);
  --brand-500: oklch(0.64 0.142 18.0);
  --brand-600: oklch(0.56 0.142 18.0);
  --brand-700: oklch(0.48 0.134 18.0);
  --brand-800: oklch(0.40 0.119 18.0);
  --brand-900: oklch(0.32 0.099 18.0);
  --brand-950: oklch(0.24 0.078 18.0);
}

Colors that work with #821528

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#EDC0C8
Hairlines and dividers
Muted text#9B4B59
Captions on the surface
Accent#128554
Second voice, not a rival
Dark variant#6E1222
Hover, pressed, headers
Light variant#FBE9EC
Selected rows, tints
Dark surface#241417
Dark-mode background
Hover#63101F
One step down in lightness
Pressed#450B15
Two steps down
Disabled#9F6872
Chroma pulled out
Focus ring#9C0F28
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 #821528

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
  • Text on black or near-black surfaces
  • 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
  • Weight70/100
  • 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#15826F
Analogous left#82155F
Analogous right#823815
Split-complement 1#158238
Split-complement 2#155F82
Triadic 1#288215
Triadic 2#152882
Tetradic#5F8215
On the wheel
Base+30°−30°+120°+240°+180°350°

#821528 sits at 350°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red51.0%
Green8.2%
Blue15.7%
R · 0–255
130
0x82
G · 0–255
21
0x15
B · 0–255
40
0x28

CMYK percentages

Cyan0.0%
Magenta83.8%
Yellow69.2%
Key (black)49.0%

Total ink coverage is 202%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#821528 text on a black background

contrast 2.09:1

Card sample

#821528 text on a white background

contrast 10.06:1

Card sample

#821528 on grey

9.18:1

#821528 on its own surface

9.26:1

#821528 on its dark surface

1.76:1

CSS3 live lab

Text font color

The quick brown fox

color: #821528;
Background color
Panel with #821528 background
background-color: #821528;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #821528;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(130, 21, 40, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(130, 21, 40, 0.45);
Border & gradient
Gradient panel
border: 3px solid #821528;
background: linear-gradient(135deg, #821528, #824B15);
Gradient text

Gradient headline

background: linear-gradient(90deg, #821528, #826615);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #821528;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #821528;
caret-color: #821528;
Left rule
Pull quote or callout
border-left: 4px solid #821528;
Ring + tint
Selected chip
background: #FBE9EC;
box-shadow: inset 0 0 0 2px #821528;
Conic badge
68%
background: conic-gradient(#821528 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #821528 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(130, 21, 40, 0.5)
rgb(130 21 40 / 50%)
#82152880
hsl(350 72% 30% / 50%)
color-mix(in srgb, #821528 50%, transparent)
Alpha8-digit hexFlat on white
10%#8215281a#F3E8EA
20%#82152833#E6D0D4
40%#82152866#CDA1A9
60%#82152899#B4737E
80%#821528cc#9B4453

Gradients from #821528

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, #B71D38, #821528 45%, #6E1222);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #821528, #684311);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #821528, #15826F);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #D12240 0%, #821528 45%, #6E1222 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%, #AE1C8B 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #9C4F19 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #6E1222 0%, transparent 65%), #821528;

Monochromatic scale

Palettes built from #821528

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.

#821528 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 2.09:1 — lift it to #DD2A4A 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.

#821528, answered

What color is #821528?

#821528 is a dark vivid red, closest to Brown (ΔE2000 9.6). It sits at 350° on the hue wheel with 72% saturation and 30% lightness, which reads as warm.

What is the RGB value of #821528?

rgb(130, 21, 40) — 130 red, 21 green and 40 blue out of 255, or 51% / 8.2% / 15.7% by channel.

What is #821528 in HSL and HSV?

hsl(350, 72%, 30%) and hsv(350, 84%, 51%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #821528 a light or a dark color?

It is a dark color. Relative luminance is 0.0544 and perceived brightness is 29%, so white text on it reaches 10.06:1.

Should I use black or white text on #821528?

White. It scores 10.06:1 against #821528, versus 2.09:1 for black — AAA at any size.

Is #821528 accessible on a white background?

#821528 on white scores 10.06:1, which clears AAA at every size.

What is the complementary color of #821528?

#15826F sits directly opposite on the wheel. Softer options are the split-complements #158238 and #155F82, which give the same contrast with far less vibration.

What colors go well with #821528?

For interface work: #FAF4F5 as the surface, #EDC0C8 for borders, #9B4B59 for secondary text, #128554 as an accent and #6E1222 for hover and pressed states. For a palette, the analogous pair #82155F and #823815 stays calm, while #15826F is the loudest partner.

What is #821528 in CMYK for printing?

cmyk(0%, 84%, 69%, 49%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #821528 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 #822A15; nudged cooler, #831350.

Which Tailwind color is closest to #821528?

The red family — its 500 step is #ef4444, ΔE2000 25.8 away. That is a visible difference, so define #821528 as a custom token rather than reaching for the built-in.

How do I use #821528 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#821528] or text-[#821528], 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 #821528 with 50% opacity?

rgba(130, 21, 40, 0.5), or #82152880 in eight-digit hex. Over white that composites to #C18A94; over black, #410B14.

Is #821528 a web-safe color?

No. The nearest web-safe colour is #990033, ΔE2000 4.9 away. The palette only matters for legacy displays and some email clients now.

What does the color #821528 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 #821528?

The safest is same-hue elevation: linear-gradient(135deg, #B71D38, #821528 45%, #6E1222). For more colour, a short hue run to #684311 keeps it rich without turning muddy.

Work with #821528 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #821528 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.