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orange · warm

#511c0a

a deep, electric orange · warm · closest name: Maroon

Token name suggestion: Cellar Apricot

RGB
81, 28, 10
HSL
15°, 78%, 18%
CMYK
0, 65, 88, 68
Luminance
0.0260

#511c0a is a deep electric orange, 15° on the wheel and 8/100 on the cool side. Put white text on it (13.81:1). As text it scores 13.81:1 on white — safe at any size. Nearest name is Maroon, nearest Tailwind family is stone.

hsl(15 78% 18%)rgb(81 28 10)Base step 950AAA inkWarm

At a glance

Every number on this page in one read: what #511c0a is made of, how bright it looks, and which way it leans.

Hex
#511c0a
Hue
15°
orange
Saturation
78%
electric
Lightness
18%
deep
Brightness
32%
HSV value
Perceived
19%
weighted brightness
Luminance
0.0260
WCAG relative
Temperature
Warm
8/100 cool
Color family
Orange
Tone
Electric
Best ink
White
13.81:1
Closest name
Maroon
ΔE2000 10.8
Chroma
33.3
LCH, 0–130ish
OKLCH L
0.305
perceptual lightness
Tailwind
stone
500 · ΔE 30
Web-safe
#663300
nearest of 216
Where it sits
Hue15° of 360°
Saturation78%
Lightness18%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #511c0a.

Temperature
Warm ← → Cool8% 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
Red67%
Green32%
Blue1%

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

Every format

HEX#511c0a
HEX (8-digit)#511c0aff
RGBrgb(81, 28, 10)
RGBArgba(81, 28, 10, 1)
HSLhsl(15, 78%, 18%)
HSV / HSBhsv(15, 88%, 32%)
HWBhwb(15 4% 68%)
CMYKcmyk(0%, 65%, 88%, 68%)
LABlab(18.4 23.8 23.3)
LCHlch(18.4 33.3 44.5)
OKLCHoklch(0.305 0.084 38.3)
XYZ (D65)xyz(3.86, 2.60, 0.59)
Decimal5315594
Display P3color(display-p3 0.318 0.110 0.039)
Web-safe#663300

Copy-ready code

every platformclick to select
/* CSS */
color: #511c0a;
background-color: #511c0a;
/* CSS custom property */
--brand: #511c0a;
/* Tailwind (arbitrary) */
class="text-[#511c0a] bg-[#511c0a]"
/* SCSS */
$brand: #511c0a;
/* SwiftUI */
Color(red: 0.318, green: 0.110, blue: 0.039)
/* UIKit */
UIColor(red: 0.318, green: 0.110, blue: 0.039, alpha: 1)
/* Android XML */
<color name="brand">#511C0A</color>
/* Android Compose */
Color(0xFF511C0A)
/* Flutter */
Color(0xFF511C0A)
/* Python / OpenCV (BGR) */
(10, 28, 81)
/* Python / PIL (RGB) */
(81, 28, 10)
/* Java AWT */
new Color(81, 28, 10)
/* .NET */
Color.FromArgb(255, 81, 28, 10)
/* OpenGL / Unity (0–1) */
(0.3176f, 0.1098f, 0.0392f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{81,28,10}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #511c0a 85%, white);
border-color: color-mix(in oklab, #511c0a 40%, transparent);
/* theme-aware in one line */
color: light-dark(#71270E, #EEDAD3);
/* relative colour syntax */
--hover: hsl(from #511c0a 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: #FCF5F3;
  --brand-100: #F9EBE6;
  --brand-200: #F5D3C7;
  --brand-300: #F3B19B;
  --brand-400: #EC8A69;
  --brand-500: #E66437;
  --brand-600: #DA4B1B;
  --brand-700: #B63F16;
  --brand-800: #913212;
  --brand-900: #692811;
  --brand-950: #511c0a;
  --brand: #511c0a;
  --brand-ink: #ffffff;
  --brand-surface: #FAF6F4;
  --brand-border: #EDCBC0;
  --brand-hover: #311106;
  --brand-pressed: #110602;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #241814;
    --brand-ink: #EEDAD3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FCF5F3',
        100: '#F9EBE6',
        200: '#F5D3C7',
        300: '#F3B19B',
        400: '#EC8A69',
        500: '#E66437',
        600: '#DA4B1B',
        700: '#B63F16',
        800: '#913212',
        900: '#692811',
        950: '#511c0a',
        DEFAULT: '#511c0a',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FCF5F3,
  '100': #F9EBE6,
  '200': #F5D3C7,
  '300': #F3B19B,
  '400': #EC8A69,
  '500': #E66437,
  '600': #DA4B1B,
  '700': #B63F16,
  '800': #913212,
  '900': #692811,
  '950': #511c0a,
);
$brand-base: #511c0a;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#FCF5F3", "$type": "color" },
      "100": { "$value": "#F9EBE6", "$type": "color" },
      "200": { "$value": "#F5D3C7", "$type": "color" },
      "300": { "$value": "#F3B19B", "$type": "color" },
      "400": { "$value": "#EC8A69", "$type": "color" },
      "500": { "$value": "#E66437", "$type": "color" },
      "600": { "$value": "#DA4B1B", "$type": "color" },
      "700": { "$value": "#B63F16", "$type": "color" },
      "800": { "$value": "#913212", "$type": "color" },
      "900": { "$value": "#692811", "$type": "color" },
      "950": { "$value": "#511c0a", "$type": "color" }
    },
    "brandInk": { "$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 #511c0a · 13.81:1
Use #ffffffAAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 13.81:1 · recommended
AA pass · AA large pass · AAA pass
Aa
Black text · 1.52:1
AA fail · AA large fail · AAA fail
Reading the other direction: #511c0a as text scores 13.81:1 on white and 1.52:1 on black.
Best tinted ink on it, if plain black or white feels flat: #FCEDE8 at 12.11:1.

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
#511c0a · 13.81:1
AA on whitealready passes
#511c0a
The quick fox
#511c0a · 13.81:1
AAA on whitealready passes
#511c0a
The quick fox
#D0481A · 4.62:1
AA on black+28% L
#D0481A
The quick fox
#E9754D · 7.12:1
AAA on black+43% L
#E9754D

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #511C0A 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
#511c0a on white: 13.81:1
AA ✓ pass · AA-large · AAA
Aa
#511c0a on black: 1.52:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #511c0a as text on that neutral, and that neutral as text on #511c0a.

NeutralRatioBoth directions
White13.81:1AaAa
Slate 5013.20:1AaAa
Slate 10012.61:1AaAa
Slate 20011.20:1AaAa
Slate 3009.30:1AaAa
Slate 4005.39:1AaAa
Slate 5002.90:1AaAa
Slate 6001.82:1AaAa
Slate 7001.33:1AaAa
Slate 8001.06:1AaAa
Slate 9001.29:1AaAa
Black1.52:1AaAa
Colour vision deficiency
true color
protanopia · #2B2508
deuteranopia · #383108
tritanopia · #5A0F18

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. #511c0a is pinned to step 950; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#FCF5F3
#F9EBE6
#F5D3C7
#F3B19B
#EC8A69
#E66437
#DA4B1B
#B63F16
#913212
#692811
#511c0a
Base = 950Lightest = 50 · #FCF5F3Darkest = 950 · #511c0aText 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 0.021 38.3);
  --brand-100: oklch(0.94 0.034 38.3);
  --brand-200: oklch(0.88 0.051 38.3);
  --brand-300: oklch(0.80 0.066 38.3);
  --brand-400: oklch(0.72 0.078 38.3);
  --brand-500: oklch(0.64 0.084 38.3);
  --brand-600: oklch(0.56 0.084 38.3);
  --brand-700: oklch(0.48 0.079 38.3);
  --brand-800: oklch(0.40 0.071 38.3);
  --brand-900: oklch(0.32 0.059 38.3);
  --brand-950: oklch(0.24 0.046 38.3);
}

Colors that work with #511c0a

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#FAF6F4
Tinted page background
Border#EDCBC0
Hairlines and dividers
Muted text#9B5F4B
Captions on the surface
Accent#085253
Second voice, not a rival
Dark variant#71270E
Hover, pressed, headers
Light variant#FCEDE8
Selected rows, tints
Dark surface#241814
Dark-mode background
Hover#311106
One step down in lightness
Pressed#110602
Two steps down
Disabled#7C5A4F
Chroma pulled out
Focus ring#691F07
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 #511c0a

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
  • 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.

friendlyenergeticaffordablesocial

Orange is red with the aggression taken out — approachable, active, and strongly associated with buying and doing.

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

Hard to make feel premium, and it collides with the "caution" band in status systems.

Reads as
  • FormalityHigh
  • EnergyHigh
  • Weight82/100
  • 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#0A3F51
Analogous left#510A1B
Analogous right#513F0A
Split-complement 1#0A513F
Split-complement 2#0A1B51
Triadic 1#0A511C
Triadic 2#1C0A51
Tetradic#1B510A
On the wheel
Base+30°−30°+120°+240°+180°15°

#511c0a sits at 15°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red31.8%
Green11.0%
Blue3.9%
R · 0–255
81
0x51
G · 0–255
28
0x1c
B · 0–255
10
0x0a

CMYK percentages

Cyan0.0%
Magenta65.4%
Yellow87.7%
Key (black)68.2%

Total ink coverage is 221%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#511c0a text on a black background

contrast 1.52:1

Card sample

#511c0a text on a white background

contrast 13.81:1

Card sample

#511c0a on grey

12.61:1

#511c0a on its own surface

12.86:1

#511c0a on its dark surface

1.25:1

CSS3 live lab

Text font color

The quick brown fox

color: #511c0a;
Background color
Panel with #511c0a background
background-color: #511c0a;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #511c0a;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(81, 28, 10, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(81, 28, 10, 0.45);
Border & gradient
Gradient panel
border: 3px solid #511c0a;
background: linear-gradient(135deg, #511c0a, #514B0A);
Gradient text

Gradient headline

background: linear-gradient(90deg, #511c0a, #45510A);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #511c0a;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #511c0a;
caret-color: #511c0a;
Left rule
Pull quote or callout
border-left: 4px solid #511c0a;
Ring + tint
Selected chip
background: #FCEDE8;
box-shadow: inset 0 0 0 2px #511c0a;
Conic badge
68%
background: conic-gradient(#511c0a 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #511c0a 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(81, 28, 10, 0.5)
rgb(81 28 10 / 50%)
#511c0a80
hsl(15 78% 18% / 50%)
color-mix(in srgb, #511c0a 50%, transparent)
Alpha8-digit hexFlat on white
10%#511c0a1a#EEE8E7
20%#511c0a33#DCD2CE
40%#511c0a66#B9A49D
60%#511c0a99#97776C
80%#511c0acc#74493B

Gradients from #511c0a

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, #872F11, #511c0a 45%, #71270E);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #511c0a, #353607);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #511c0a, #0A3F51);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #A23814 0%, #511c0a 45%, #71270E 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #FAF6F4, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #7E1034 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #6C5D0D 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #71270E 0%, transparent 65%), #511c0a;

Monochromatic scale

Palettes built from #511c0a

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.

#511c0a in the real world

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

Industries
E-commerceFood deliveryLogisticsCreator tools
Common UI roles
ButtonsLinksFocus statesCharts
Print note

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

On screens

Very dark values collapse into each other on cheap panels — leave more lightness between your darkest steps than the numbers suggest.

In dark mode

Too dim on dark surfaces at 1.52:1 — lift it to #D0481A 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.

#511c0a, answered

What color is #511c0a?

#511c0a is a deep electric orange, closest to Maroon (ΔE2000 10.8). It sits at 15° on the hue wheel with 78% saturation and 18% lightness, which reads as warm.

What is the RGB value of #511c0a?

rgb(81, 28, 10) — 81 red, 28 green and 10 blue out of 255, or 31.8% / 11% / 3.9% by channel.

What is #511c0a in HSL and HSV?

hsl(15, 78%, 18%) and hsv(15, 88%, 32%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #511c0a a light or a dark color?

It is a dark color. Relative luminance is 0.0260 and perceived brightness is 19%, so white text on it reaches 13.81:1.

Should I use black or white text on #511c0a?

White. It scores 13.81:1 against #511c0a, versus 1.52:1 for black — AAA at any size.

Is #511c0a accessible on a white background?

#511c0a on white scores 13.81:1, which clears AAA at every size.

What is the complementary color of #511c0a?

#0A3F51 sits directly opposite on the wheel. Softer options are the split-complements #0A513F and #0A1B51, which give the same contrast with far less vibration.

What colors go well with #511c0a?

For interface work: #FAF6F4 as the surface, #EDCBC0 for borders, #9B5F4B for secondary text, #085253 as an accent and #71270E for hover and pressed states. For a palette, the analogous pair #510A1B and #513F0A stays calm, while #0A3F51 is the loudest partner.

What is #511c0a in CMYK for printing?

cmyk(0%, 65%, 88%, 68%). 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 #511c0a warm or cool?

Warm — it scores 8 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #51250A; nudged cooler, #520911.

Which Tailwind color is closest to #511c0a?

The stone family — its 500 step is #78716c, ΔE2000 30 away. That is a visible difference, so define #511c0a as a custom token rather than reaching for the built-in.

How do I use #511c0a in Tailwind CSS?

Inline it as an arbitrary value with bg-[#511c0a] or text-[#511c0a], 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 #511c0a with 50% opacity?

rgba(81, 28, 10, 0.5), or #511c0a80 in eight-digit hex. Over white that composites to #A88E85; over black, #290E05.

Is #511c0a a web-safe color?

No. The nearest web-safe colour is #663300, ΔE2000 11.3 away. The palette only matters for legacy displays and some email clients now.

What does the color #511c0a mean?

As a orange, it reads friendly, energetic, affordable. Orange is red with the aggression taken out — approachable, active, and strongly associated with buying and doing. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #511c0a?

The safest is same-hue elevation: linear-gradient(135deg, #872F11, #511c0a 45%, #71270E). For more colour, a short hue run to #353607 keeps it rich without turning muddy.

Work with #511c0a in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #511c0a at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.