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red · warm

#df102b

a balanced, electric red · warm · closest name: Crimson

Token name suggestion: Atlas Ember

RGB
223, 16, 43
HSL
352°, 87%, 47%
CMYK
0, 93, 81, 13
Luminance
0.1623

#df102b is a balanced electric red, 352° on the wheel and 21/100 on the cool side. Put white text on it (4.95:1). As text it scores 4.95:1 on white — safe at any size. Nearest name is Crimson, nearest Tailwind family is red.

hsl(352 87% 47%)rgb(223 16 43)Base step 600AA inkWarm

At a glance

Every number on this page in one read: what #df102b is made of, how bright it looks, and which way it leans.

Hex
#df102b
Hue
352°
red
Saturation
87%
electric
Lightness
47%
balanced
Brightness
87%
HSV value
Perceived
48%
weighted brightness
Luminance
0.1623
WCAG relative
Temperature
Warm
21/100 cool
Color family
Red
Tone
Electric
Best ink
White
4.95:1
Closest name
Crimson
ΔE2000 4.5
Chroma
84.0
LCH, 0–130ish
OKLCH L
0.574
perceptual lightness
Tailwind
red
500 · ΔE 7.9
Web-safe
#CC0033
nearest of 216
Where it sits
Hue352° of 360°
Saturation87%
Lightness47%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #df102b.

Temperature
Warm ← → Cool21% 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
Red97%
Green2%
Blue1%

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

Every format

HEX#df102b
HEX (8-digit)#df102bff
RGBrgb(223, 16, 43)
RGBArgba(223, 16, 43, 1)
HSLhsl(352, 87%, 47%)
HSV / HSBhsv(352, 93%, 87%)
HWBhwb(352 6% 13%)
CMYKcmyk(0%, 93%, 81%, 13%)
LABlab(47.3 71.6 43.9)
LCHlch(47.3 84.0 31.5)
OKLCHoklch(0.574 0.227 24.4)
XYZ (D65)xyz(31.06, 16.24, 3.78)
Decimal14618667
Display P3color(display-p3 0.875 0.063 0.169)
Web-safe#CC0033

Copy-ready code

every platformclick to select
/* CSS */
color: #df102b;
background-color: #df102b;
/* CSS custom property */
--brand: #df102b;
/* Tailwind (arbitrary) */
class="text-[#df102b] bg-[#df102b]"
/* SCSS */
$brand: #df102b;
/* SwiftUI */
Color(red: 0.875, green: 0.063, blue: 0.169)
/* UIKit */
UIColor(red: 0.875, green: 0.063, blue: 0.169, alpha: 1)
/* Android XML */
<color name="brand">#DF102B</color>
/* Android Compose */
Color(0xFFDF102B)
/* Flutter */
Color(0xFFDF102B)
/* Python / OpenCV (BGR) */
(43, 16, 223)
/* Python / PIL (RGB) */
(223, 16, 43)
/* Java AWT */
new Color(223, 16, 43)
/* .NET */
Color.FromArgb(255, 223, 16, 43)
/* OpenGL / Unity (0–1) */
(0.8745f, 0.0627f, 0.1686f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{223,16,43}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #df102b 85%, white);
border-color: color-mix(in oklab, #df102b 40%, transparent);
/* theme-aware in one line */
color: light-dark(#770917, #EED3D6);
/* relative colour syntax */
--hover: hsl(from #df102b 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: #FDF2F3;
  --brand-100: #FAE5E8;
  --brand-200: #F7C4CB;
  --brand-300: #F796A3;
  --brand-400: #F46275;
  --brand-500: #F02E47;
  --brand-600: #df102b;
  --brand-700: #BE0E25;
  --brand-800: #980B1D;
  --brand-900: #6E0C19;
  --brand-950: #450810;
  --brand: #df102b;
  --brand-ink: #ffffff;
  --brand-surface: #FAF4F5;
  --brand-border: #EDC0C6;
  --brand-hover: #BE0E25;
  --brand-pressed: #9D0B1E;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #241416;
    --brand-ink: #EED3D6;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FDF2F3',
        100: '#FAE5E8',
        200: '#F7C4CB',
        300: '#F796A3',
        400: '#F46275',
        500: '#F02E47',
        600: '#df102b',
        700: '#BE0E25',
        800: '#980B1D',
        900: '#6E0C19',
        950: '#450810',
        DEFAULT: '#df102b',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FDF2F3,
  '100': #FAE5E8,
  '200': #F7C4CB,
  '300': #F796A3,
  '400': #F46275,
  '500': #F02E47,
  '600': #df102b,
  '700': #BE0E25,
  '800': #980B1D,
  '900': #6E0C19,
  '950': #450810,
);
$brand-base: #df102b;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#FDF2F3", "$type": "color" },
      "100": { "$value": "#FAE5E8", "$type": "color" },
      "200": { "$value": "#F7C4CB", "$type": "color" },
      "300": { "$value": "#F796A3", "$type": "color" },
      "400": { "$value": "#F46275", "$type": "color" },
      "500": { "$value": "#F02E47", "$type": "color" },
      "600": { "$value": "#df102b", "$type": "color" },
      "700": { "$value": "#BE0E25", "$type": "color" },
      "800": { "$value": "#980B1D", "$type": "color" },
      "900": { "$value": "#6E0C19", "$type": "color" },
      "950": { "$value": "#450810", "$type": "color" }
    },
    "brandInk": { "$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 #df102b · 4.95:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 4.95:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 4.25:1
AA fail · AA large pass · AAA fail
Reading the other direction: #df102b as text scores 4.95:1 on white and 4.25:1 on black.
Best tinted ink on it, if plain black or white feels flat: #FDE7EA at 4.19:1.

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
#df102b · 4.95:1
AA on whitealready passes
#df102b
The quick fox
#B00D22 · 7.18:1
AAA on white−10% L
#B00D22
The quick fox
#E9112D · 4.58:1
AA on black+2% L
#E9112D
The quick fox
#F46679 · 7.02:1
AAA on black+21% L
#F46679

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #DF102B 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
#df102b on white: 4.95:1
AA ✓ pass · AA-large · AAA
Aa
#df102b on black: 4.25:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #df102b as text on that neutral, and that neutral as text on #df102b.

NeutralRatioBoth directions
White4.95:1AaAa
Slate 504.73:1AaAa
Slate 1004.51:1AaAa
Slate 2004.01:1AaAa
Slate 3003.33:1AaAa
Slate 4001.93:1AaAa
Slate 5001.04:1AaAa
Slate 6001.53:1AaAa
Slate 7002.09:1AaAa
Slate 8002.96:1AaAa
Slate 9003.61:1AaAa
Black4.25:1AaAa
Colour vision deficiency
true color
protanopia · #5E5529
deuteranopia · #8E7F21
tritanopia · #F60020

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. #df102b is pinned to step 600; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#FDF2F3
#FAE5E8
#F7C4CB
#F796A3
#F46275
#F02E47
#df102b
#BE0E25
#980B1D
#6E0C19
#450810
Base = 600Lightest = 50 · #FDF2F3Darkest = 950 · #450810Text 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 0.057 24.4);
  --brand-100: oklch(0.94 0.091 24.4);
  --brand-200: oklch(0.88 0.136 24.4);
  --brand-300: oklch(0.80 0.177 24.4);
  --brand-400: oklch(0.72 0.209 24.4);
  --brand-500: oklch(0.64 0.227 24.4);
  --brand-600: oklch(0.56 0.227 24.4);
  --brand-700: oklch(0.48 0.213 24.4);
  --brand-800: oklch(0.40 0.190 24.4);
  --brand-900: oklch(0.32 0.159 24.4);
  --brand-950: oklch(0.24 0.125 24.4);
}

Colors that work with #df102b

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#EDC0C6
Hairlines and dividers
Muted text#9B4B55
Captions on the surface
Accent#09C37D
Second voice, not a rival
Dark variant#770917
Hover, pressed, headers
Light variant#FDE7EA
Selected rows, tints
Dark surface#241416
Dark-mode background
Hover#BE0E25
One step down in lightness
Pressed#9D0B1E
Two steps down
Disabled#C19EA3
Chroma pulled out
Focus ring#FB0928
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 #df102b

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
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Full-page backgrounds — tiring over long sessions
  • 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.

At this chroma the association is amplified — it will dominate anything placed beside it, so give it space and use it sparingly. The mid lightness keeps it versatile in both themes.

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
  • FormalityLow
  • EnergyHigh
  • Weight53/100
  • 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#10DFC4
Analogous left#DF1093
Analogous right#DF5D10
Split-complement 1#10DF5D
Split-complement 2#1093DF
Triadic 1#2BDF10
Triadic 2#102BDF
Tetradic#93DF10
On the wheel
Base+30°−30°+120°+240°+180°352°

#df102b sits at 352°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red87.5%
Green6.3%
Blue16.9%
R · 0–255
223
0xdf
G · 0–255
16
0x10
B · 0–255
43
0x2b

CMYK percentages

Cyan0.0%
Magenta92.8%
Yellow80.7%
Key (black)12.5%

Total ink coverage is 186%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#df102b text on a black background

contrast 4.25:1

Card sample

#df102b text on a white background

contrast 4.95:1

Card sample

#df102b on grey

4.51:1

#df102b on its own surface

4.55:1

#df102b on its dark surface

3.58:1

CSS3 live lab

Text font color

The quick brown fox

color: #df102b;
Background color
Panel with #df102b background
background-color: #df102b;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #df102b;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(223, 16, 43, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(223, 16, 43, 0.45);
Border & gradient
Gradient panel
border: 3px solid #df102b;
background: linear-gradient(135deg, #df102b, #DF7F10);
Gradient text

Gradient headline

background: linear-gradient(90deg, #df102b, #DFB310);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #df102b;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #df102b;
caret-color: #df102b;
Left rule
Pull quote or callout
border-left: 4px solid #df102b;
Ring + tint
Selected chip
background: #FDE7EA;
box-shadow: inset 0 0 0 2px #df102b;
Conic badge
68%
background: conic-gradient(#df102b 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #df102b 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(223, 16, 43, 0.5)
rgb(223 16 43 / 50%)
#df102b80
hsl(352 87% 47% / 50%)
color-mix(in srgb, #df102b 50%, transparent)
Alpha8-digit hexFlat on white
10%#df102b1a#FCE7EA
20%#df102b33#F9CFD5
40%#df102b66#F29FAA
60%#df102b99#EC7080
80%#df102bcc#E54055

Gradients from #df102b

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, #F13B53, #df102b 45%, #770917);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #df102b, #C37E0E);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #df102b, #10DFC4);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #F3586C 0%, #df102b 45%, #770917 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%, #F032BA 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #EF7D1F 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #770917 0%, transparent 65%), #df102b;

Monochromatic scale

Palettes built from #df102b

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.

#df102b 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

Sits outside most CMYK gamuts — expect a duller press result, or specify a spot ink.

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 4.25:1 — lift it to #E9112D 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.

#df102b, answered

What color is #df102b?

#df102b is a balanced electric red, closest to Crimson (ΔE2000 4.5). It sits at 352° on the hue wheel with 87% saturation and 47% lightness, which reads as warm.

What is the RGB value of #df102b?

rgb(223, 16, 43) — 223 red, 16 green and 43 blue out of 255, or 87.5% / 6.3% / 16.9% by channel.

What is #df102b in HSL and HSV?

hsl(352, 87%, 47%) and hsv(352, 93%, 87%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #df102b a light or a dark color?

It is a dark color. Relative luminance is 0.1623 and perceived brightness is 48%, so white text on it reaches 4.95:1.

Should I use black or white text on #df102b?

White. It scores 4.95:1 against #df102b, versus 4.25:1 for black — AA at any size.

Is #df102b accessible on a white background?

#df102b on white scores 4.95:1, which clears AA at every size but not AAA.

What is the complementary color of #df102b?

#10DFC4 sits directly opposite on the wheel. Softer options are the split-complements #10DF5D and #1093DF, which give the same contrast with far less vibration.

What colors go well with #df102b?

For interface work: #FAF4F5 as the surface, #EDC0C6 for borders, #9B4B55 for secondary text, #09C37D as an accent and #770917 for hover and pressed states. For a palette, the analogous pair #DF1093 and #DF5D10 stays calm, while #10DFC4 is the loudest partner.

What is #df102b in CMYK for printing?

cmyk(0%, 93%, 81%, 13%). This is a screen-to-ink approximation — a color this saturated sits outside most CMYK gamuts and will print duller than it looks here.

Is #df102b warm or cool?

Warm — it scores 21 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #DF3410; nudged cooler, #E20E77.

Which Tailwind color is closest to #df102b?

The red family — its 500 step is #ef4444, ΔE2000 7.9 away. That is a visible difference, so define #df102b as a custom token rather than reaching for the built-in.

How do I use #df102b in Tailwind CSS?

Inline it as an arbitrary value with bg-[#df102b] or text-[#df102b], 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 #df102b with 50% opacity?

rgba(223, 16, 43, 0.5), or #df102b80 in eight-digit hex. Over white that composites to #EF8895; over black, #700816.

Is #df102b a web-safe color?

No. The nearest web-safe colour is #CC0033, ΔE2000 6 away. The palette only matters for legacy displays and some email clients now.

What does the color #df102b 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 #df102b?

The safest is same-hue elevation: linear-gradient(135deg, #F13B53, #df102b 45%, #770917). For more colour, a short hue run to #C37E0E keeps it rich without turning muddy.

Work with #df102b in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #df102b at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.