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red · warm

#cd010c

a dark, electric red · warm · closest name: Firebrick

Token name suggestion: Dusk Cardinal

RGB
205, 1, 12
HSL
357°, 99%, 40%
CMYK
0, 100, 94, 20
Luminance
0.1303

#cd010c is a dark electric red, 357° on the wheel and 18/100 on the cool side. Put white text on it (5.82:1). As text it scores 5.82:1 on white — safe at any size. Nearest name is Firebrick, nearest Tailwind family is red.

hsl(357 99% 40%)rgb(205 1 12)Base step 700AA inkWarm

At a glance

Every number on this page in one read: what #cd010c is made of, how bright it looks, and which way it leans.

Hex
#cd010c
Hue
357°
red
Saturation
99%
electric
Lightness
40%
dark
Brightness
80%
HSV value
Perceived
44%
weighted brightness
Luminance
0.1303
WCAG relative
Temperature
Warm
18/100 cool
Color family
Red
Tone
Electric
Best ink
White
5.82:1
Closest name
Firebrick
ΔE2000 6.1
Chroma
86.2
LCH, 0–130ish
OKLCH L
0.533
perceptual lightness
Tailwind
red
500 · ΔE 13.3
Web-safe
#CC0000
nearest of 216
Where it sits
Hue357° of 360°
Saturation99%
Lightness40%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #cd010c.

Temperature
Warm ← → Cool18% 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
Red100%
Green0%
Blue0%

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

Every format

HEX#cd010c
HEX (8-digit)#cd010cff
RGBrgb(205, 1, 12)
RGBArgba(205, 1, 12, 1)
HSLhsl(357, 99%, 40%)
HSV / HSBhsv(357, 100%, 80%)
HWBhwb(357 0% 20%)
CMYKcmyk(0%, 100%, 94%, 20%)
LABlab(42.8 68.0 53.1)
LCHlch(42.8 86.2 38.0)
OKLCHoklch(0.533 0.218 28.2)
XYZ (D65)xyz(25.26, 13.03, 1.53)
Decimal13435148
Display P3color(display-p3 0.804 0.004 0.047)
Web-safe#CC0000

Copy-ready code

every platformclick to select
/* CSS */
color: #cd010c;
background-color: #cd010c;
/* CSS custom property */
--brand: #cd010c;
/* Tailwind (arbitrary) */
class="text-[#cd010c] bg-[#cd010c]"
/* SCSS */
$brand: #cd010c;
/* SwiftUI */
Color(red: 0.804, green: 0.004, blue: 0.047)
/* UIKit */
UIColor(red: 0.804, green: 0.004, blue: 0.047, alpha: 1)
/* Android XML */
<color name="brand">#CD010C</color>
/* Android Compose */
Color(0xFFCD010C)
/* Flutter */
Color(0xFFCD010C)
/* Python / OpenCV (BGR) */
(12, 1, 205)
/* Python / PIL (RGB) */
(205, 1, 12)
/* Java AWT */
new Color(205, 1, 12)
/* .NET */
Color.FromArgb(255, 205, 1, 12)
/* OpenGL / Unity (0–1) */
(0.8039f, 0.0039f, 0.0471f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{205,1,12}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #cd010c 85%, white);
border-color: color-mix(in oklab, #cd010c 40%, transparent);
/* theme-aware in one line */
color: light-dark(#7F0107, #EED3D4);
/* relative colour syntax */
--hover: hsl(from #cd010c 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: #FEF1F2;
  --brand-100: #FCE3E5;
  --brand-200: #FBC0C3;
  --brand-300: #FE8F95;
  --brand-400: #FE5860;
  --brand-500: #FE202C;
  --brand-600: #F4010E;
  --brand-700: #cd010c;
  --brand-800: #A20109;
  --brand-900: #75050B;
  --brand-950: #490307;
  --brand: #cd010c;
  --brand-ink: #ffffff;
  --brand-surface: #FAF4F5;
  --brand-border: #EDC0C2;
  --brand-hover: #A9010A;
  --brand-pressed: #860108;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #241415;
    --brand-ink: #EED3D4;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FEF1F2',
        100: '#FCE3E5',
        200: '#FBC0C3',
        300: '#FE8F95',
        400: '#FE5860',
        500: '#FE202C',
        600: '#F4010E',
        700: '#cd010c',
        800: '#A20109',
        900: '#75050B',
        950: '#490307',
        DEFAULT: '#cd010c',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FEF1F2,
  '100': #FCE3E5,
  '200': #FBC0C3,
  '300': #FE8F95,
  '400': #FE5860,
  '500': #FE202C,
  '600': #F4010E,
  '700': #cd010c,
  '800': #A20109,
  '900': #75050B,
  '950': #490307,
);
$brand-base: #cd010c;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#FEF1F2", "$type": "color" },
      "100": { "$value": "#FCE3E5", "$type": "color" },
      "200": { "$value": "#FBC0C3", "$type": "color" },
      "300": { "$value": "#FE8F95", "$type": "color" },
      "400": { "$value": "#FE5860", "$type": "color" },
      "500": { "$value": "#FE202C", "$type": "color" },
      "600": { "$value": "#F4010E", "$type": "color" },
      "700": { "$value": "#cd010c", "$type": "color" },
      "800": { "$value": "#A20109", "$type": "color" },
      "900": { "$value": "#75050B", "$type": "color" },
      "950": { "$value": "#490307", "$type": "color" }
    },
    "brandInk": { "$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 #cd010c · 5.82:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 5.82:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.61:1
AA fail · AA large pass · AAA fail
Reading the other direction: #cd010c as text scores 5.82:1 on white and 3.61:1 on black.
Best tinted ink on it, if plain black or white feels flat: #FFE6E7 at 4.92:1.

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
#cd010c · 5.82:1
AA on whitealready passes
#cd010c
The quick fox
#B4010A · 7.12:1
AAA on white−5% L
#B4010A
The quick fox
#EB010E · 4.54:1
AA on black+6% L
#EB010E
The quick fox
#FE5F67 · 7.05:1
AAA on black+28% L
#FE5F67

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #CD010C 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
#cd010c on white: 5.82:1
AA ✓ pass · AA-large · AAA
Aa
#cd010c on black: 3.61:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #cd010c as text on that neutral, and that neutral as text on #cd010c.

NeutralRatioBoth directions
White5.82:1AaAa
Slate 505.57:1AaAa
Slate 1005.32:1AaAa
Slate 2004.72:1AaAa
Slate 3003.92:1AaAa
Slate 4002.27:1AaAa
Slate 5001.22:1AaAa
Slate 6001.30:1AaAa
Slate 7001.78:1AaAa
Slate 8002.51:1AaAa
Slate 9003.07:1AaAa
Black3.61:1AaAa
Colour vision deficiency
true color
protanopia · #564B05
deuteranopia · #827300
tritanopia · #E3000E

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. #cd010c 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.

#FEF1F2
#FCE3E5
#FBC0C3
#FE8F95
#FE5860
#FE202C
#F4010E
#cd010c
#A20109
#75050B
#490307
Base = 700Lightest = 50 · #FEF1F2Darkest = 950 · #490307Text step on white = 700
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 0.054 28.2);
  --brand-100: oklch(0.94 0.087 28.2);
  --brand-200: oklch(0.88 0.131 28.2);
  --brand-300: oklch(0.80 0.170 28.2);
  --brand-400: oklch(0.72 0.200 28.2);
  --brand-500: oklch(0.64 0.218 28.2);
  --brand-600: oklch(0.56 0.218 28.2);
  --brand-700: oklch(0.48 0.205 28.2);
  --brand-800: oklch(0.40 0.183 28.2);
  --brand-900: oklch(0.32 0.152 28.2);
  --brand-950: oklch(0.24 0.120 28.2);
}

Colors that work with #cd010c

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#EDC0C2
Hairlines and dividers
Muted text#9B4B4F
Captions on the surface
Accent#00CC8E
Second voice, not a rival
Dark variant#7F0107
Hover, pressed, headers
Light variant#FFE6E7
Selected rows, tints
Dark surface#241415
Dark-mode background
Hover#A9010A
One step down in lightness
Pressed#860108
Two steps down
Disabled#B48A8C
Chroma pulled out
Focus ring#E2000C
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 #cd010c

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.

At this chroma the association is amplified — it will dominate anything placed beside it, so give it space and use it sparingly. 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
  • EnergyHigh
  • Weight60/100
  • 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#01CDC2
Analogous left#CD0172
Analogous right#CD5C01
Split-complement 1#01CD5C
Split-complement 2#0172CD
Triadic 1#0CCD01
Triadic 2#010CCD
Tetradic#72CD01
On the wheel
Base+30°−30°+120°+240°+180°357°

#cd010c sits at 357°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red80.4%
Green0.4%
Blue4.7%
R · 0–255
205
0xcd
G · 0–255
1
0x01
B · 0–255
12
0x0c

CMYK percentages

Cyan0.0%
Magenta99.5%
Yellow94.1%
Key (black)19.6%

Total ink coverage is 213%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#cd010c text on a black background

contrast 3.61:1

Card sample

#cd010c text on a white background

contrast 5.82:1

Card sample

#cd010c on grey

5.32:1

#cd010c on its own surface

5.36:1

#cd010c on its dark surface

3.04:1

CSS3 live lab

Text font color

The quick brown fox

color: #cd010c;
Background color
Panel with #cd010c background
background-color: #cd010c;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #cd010c;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(205, 1, 12, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(205, 1, 12, 0.45);
Border & gradient
Gradient panel
border: 3px solid #cd010c;
background: linear-gradient(135deg, #cd010c, #CD7E01);
Gradient text

Gradient headline

background: linear-gradient(90deg, #cd010c, #CDB101);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #cd010c;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #cd010c;
caret-color: #cd010c;
Left rule
Pull quote or callout
border-left: 4px solid #cd010c;
Ring + tint
Selected chip
background: #FFE6E7;
box-shadow: inset 0 0 0 2px #cd010c;
Conic badge
68%
background: conic-gradient(#cd010c 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #cd010c 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(205, 1, 12, 0.5)
rgb(205 1 12 / 50%)
#cd010c80
hsl(357 99% 40% / 50%)
color-mix(in srgb, #cd010c 50%, transparent)
Alpha8-digit hexFlat on white
10%#cd010c1a#FAE6E7
20%#cd010c33#F5CCCE
40%#cd010c66#EB999E
60%#cd010c99#E1676D
80%#cd010ccc#D7343D

Gradients from #cd010c

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, #FE0D1A, #cd010c 45%, #7F0107);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #cd010c, #AF7A01);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #cd010c, #01CDC2);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #FE2C37 0%, #cd010c 45%, #7F0107 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%, #FE03A3 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #EB7D01 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #7F0107 0%, transparent 65%), #cd010c;

Monochromatic scale

Palettes built from #cd010c

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.

#cd010c 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 3.61:1 — lift it to #EB010E 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.

#cd010c, answered

What color is #cd010c?

#cd010c is a dark electric red, closest to Firebrick (ΔE2000 6.1). It sits at 357° on the hue wheel with 99% saturation and 40% lightness, which reads as warm.

What is the RGB value of #cd010c?

rgb(205, 1, 12) — 205 red, 1 green and 12 blue out of 255, or 80.4% / 0.4% / 4.7% by channel.

What is #cd010c in HSL and HSV?

hsl(357, 99%, 40%) and hsv(357, 100%, 80%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #cd010c a light or a dark color?

It is a dark color. Relative luminance is 0.1303 and perceived brightness is 44%, so white text on it reaches 5.82:1.

Should I use black or white text on #cd010c?

White. It scores 5.82:1 against #cd010c, versus 3.61:1 for black — AA at any size.

Is #cd010c accessible on a white background?

#cd010c on white scores 5.82:1, which clears AA at every size but not AAA.

What is the complementary color of #cd010c?

#01CDC2 sits directly opposite on the wheel. Softer options are the split-complements #01CD5C and #0172CD, which give the same contrast with far less vibration.

What colors go well with #cd010c?

For interface work: #FAF4F5 as the surface, #EDC0C2 for borders, #9B4B4F for secondary text, #00CC8E as an accent and #7F0107 for hover and pressed states. For a palette, the analogous pair #CD0172 and #CD5C01 stays calm, while #01CDC2 is the loudest partner.

What is #cd010c in CMYK for printing?

cmyk(0%, 100%, 94%, 20%). 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 #cd010c warm or cool?

Warm — it scores 18 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #CD2B01; nudged cooler, #CE0057.

Which Tailwind color is closest to #cd010c?

The red family — its 500 step is #ef4444, ΔE2000 13.3 away. That is a visible difference, so define #cd010c as a custom token rather than reaching for the built-in.

How do I use #cd010c in Tailwind CSS?

Inline it as an arbitrary value with bg-[#cd010c] or text-[#cd010c], 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 #cd010c with 50% opacity?

rgba(205, 1, 12, 0.5), or #cd010c80 in eight-digit hex. Over white that composites to #E68086; over black, #670106.

Is #cd010c a web-safe color?

No. The nearest web-safe colour is #CC0000, ΔE2000 1.6 away. The palette only matters for legacy displays and some email clients now.

What does the color #cd010c 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 #cd010c?

The safest is same-hue elevation: linear-gradient(135deg, #FE0D1A, #cd010c 45%, #7F0107). For more colour, a short hue run to #AF7A01 keeps it rich without turning muddy.

Work with #cd010c in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #cd010c at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.