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red · warm

#e5233f

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

Token name suggestion: Atlas Cherry

RGB
229, 35, 63
HSL
351°, 79%, 52%
CMYK
0, 85, 73, 10
Luminance
0.1822

#e5233f is a balanced electric red, 351° on the wheel and 22/100 on the cool side. Put black text on it (4.64:1). As text it scores 4.52:1 on white — safe at any size. Nearest name is Crimson, nearest Tailwind family is red.

hsl(351 79% 52%)rgb(229 35 63)Base step 600AA inkWarm

At a glance

Every number on this page in one read: what #e5233f is made of, how bright it looks, and which way it leans.

Hex
#e5233f
Hue
351°
red
Saturation
79%
electric
Lightness
52%
balanced
Brightness
90%
HSV value
Perceived
51%
weighted brightness
Luminance
0.1822
WCAG relative
Temperature
Warm
22/100 cool
Color family
Red
Tone
Electric
Best ink
Black
4.64:1
Closest name
Crimson
ΔE2000 2.8
Chroma
79.2
LCH, 0–130ish
OKLCH L
0.595
perceptual lightness
Tailwind
red
500 · ΔE 6.1
Web-safe
#CC3333
nearest of 216
Where it sits
Hue351° of 360°
Saturation79%
Lightness52%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #e5233f.

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
Red91%
Green7%
Blue2%

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

Every format

HEX#e5233f
HEX (8-digit)#e5233fff
RGBrgb(229, 35, 63)
RGBArgba(229, 35, 63, 1)
HSLhsl(351, 79%, 52%)
HSV / HSBhsv(351, 85%, 90%)
HWBhwb(351 14% 10%)
CMYKcmyk(0%, 85%, 73%, 10%)
LABlab(49.8 70.8 35.5)
LCHlch(49.8 79.2 26.6)
OKLCHoklch(0.595 0.223 21.2)
XYZ (D65)xyz(33.82, 18.22, 6.44)
Decimal15016767
Display P3color(display-p3 0.898 0.137 0.247)
Web-safe#CC3333

Copy-ready code

every platformclick to select
/* CSS */
color: #e5233f;
background-color: #e5233f;
/* CSS custom property */
--brand: #e5233f;
/* Tailwind (arbitrary) */
class="text-[#e5233f] bg-[#e5233f]"
/* SCSS */
$brand: #e5233f;
/* SwiftUI */
Color(red: 0.898, green: 0.137, blue: 0.247)
/* UIKit */
UIColor(red: 0.898, green: 0.137, blue: 0.247, alpha: 1)
/* Android XML */
<color name="brand">#E5233F</color>
/* Android Compose */
Color(0xFFE5233F)
/* Flutter */
Color(0xFFE5233F)
/* Python / OpenCV (BGR) */
(63, 35, 229)
/* Python / PIL (RGB) */
(229, 35, 63)
/* Java AWT */
new Color(229, 35, 63)
/* .NET */
Color.FromArgb(255, 229, 35, 63)
/* OpenGL / Unity (0–1) */
(0.8980f, 0.1373f, 0.2471f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{229,35,63}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #e5233f 85%, white);
border-color: color-mix(in oklab, #e5233f 40%, transparent);
/* theme-aware in one line */
color: light-dark(#720D1C, #EED3D7);
/* relative colour syntax */
--hover: hsl(from #e5233f 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: #FCF3F4;
  --brand-100: #F9E6E9;
  --brand-200: #F5C7CE;
  --brand-300: #F39BA7;
  --brand-400: #ED687C;
  --brand-500: #E73650;
  --brand-600: #e5233f;
  --brand-700: #B6162D;
  --brand-800: #921124;
  --brand-900: #6A111E;
  --brand-950: #420A13;
  --brand: #e5233f;
  --brand-ink: #000000;
  --brand-surface: #FAF4F5;
  --brand-border: #EDC0C6;
  --brand-hover: #CC1832;
  --brand-pressed: #AC142A;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #241416;
    --brand-ink: #EED3D7;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FCF3F4',
        100: '#F9E6E9',
        200: '#F5C7CE',
        300: '#F39BA7',
        400: '#ED687C',
        500: '#E73650',
        600: '#e5233f',
        700: '#B6162D',
        800: '#921124',
        900: '#6A111E',
        950: '#420A13',
        DEFAULT: '#e5233f',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FCF3F4,
  '100': #F9E6E9,
  '200': #F5C7CE,
  '300': #F39BA7,
  '400': #ED687C,
  '500': #E73650,
  '600': #e5233f,
  '700': #B6162D,
  '800': #921124,
  '900': #6A111E,
  '950': #420A13,
);
$brand-base: #e5233f;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#FCF3F4", "$type": "color" },
      "100": { "$value": "#F9E6E9", "$type": "color" },
      "200": { "$value": "#F5C7CE", "$type": "color" },
      "300": { "$value": "#F39BA7", "$type": "color" },
      "400": { "$value": "#ED687C", "$type": "color" },
      "500": { "$value": "#E73650", "$type": "color" },
      "600": { "$value": "#e5233f", "$type": "color" },
      "700": { "$value": "#B6162D", "$type": "color" },
      "800": { "$value": "#921124", "$type": "color" },
      "900": { "$value": "#6A111E", "$type": "color" },
      "950": { "$value": "#420A13", "$type": "color" }
    },
    "brandInk": { "$value": "#000000", "$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#000000 on #e5233f · 4.64:1
Use #000000AA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 4.52:1
AA pass · AA large pass · AAA fail
Aa
Black text · 4.64:1 · recommended
AA pass · AA large pass · AAA fail
Reading the other direction: #e5233f as text scores 4.52:1 on white and 4.64:1 on black.
Best tinted ink on it, if plain black or white feels flat: #720D1C at 2.59:1.

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
#e5233f · 4.52:1
AA on whitealready passes
#e5233f
The quick fox
#AC142A · 7.27:1
AAA on white−14% L
#AC142A
The quick fox
#e5233f · 4.64:1
AA on blackalready passes
#e5233f
The quick fox
#EE6C7F · 7.09:1
AAA on black+16% L
#EE6C7F

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #E5233F 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
#e5233f on white: 4.52:1
AA ✓ pass · AA-large · AAA
Aa
#e5233f on black: 4.64:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #e5233f as text on that neutral, and that neutral as text on #e5233f.

NeutralRatioBoth directions
White4.52:1AaAa
Slate 504.32:1AaAa
Slate 1004.13:1AaAa
Slate 2003.67:1AaAa
Slate 3003.05:1AaAa
Slate 4001.76:1AaAa
Slate 5001.05:1AaAa
Slate 6001.68:1AaAa
Slate 7002.29:1AaAa
Slate 8003.23:1AaAa
Slate 9003.95:1AaAa
Black4.64:1AaAa
Colour vision deficiency
true color
protanopia · #645C3E
deuteranopia · #938538
tritanopia · #FC0031

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. #e5233f 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.

#FCF3F4
#F9E6E9
#F5C7CE
#F39BA7
#ED687C
#E73650
#e5233f
#B6162D
#921124
#6A111E
#420A13
Base = 600Lightest = 50 · #FCF3F4Darkest = 950 · #420A13Text 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 0.056 21.2);
  --brand-100: oklch(0.94 0.089 21.2);
  --brand-200: oklch(0.88 0.134 21.2);
  --brand-300: oklch(0.80 0.174 21.2);
  --brand-400: oklch(0.72 0.205 21.2);
  --brand-500: oklch(0.64 0.223 21.2);
  --brand-600: oklch(0.56 0.223 21.2);
  --brand-700: oklch(0.48 0.209 21.2);
  --brand-800: oklch(0.40 0.187 21.2);
  --brand-900: oklch(0.32 0.156 21.2);
  --brand-950: oklch(0.24 0.122 21.2);
}

Colors that work with #e5233f

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#000000
Black wins here
Surface#FAF4F5
Tinted page background
Border#EDC0C6
Hairlines and dividers
Muted text#9B4B56
Captions on the surface
Accent#11BB77
Second voice, not a rival
Dark variant#720D1C
Hover, pressed, headers
Light variant#FCE8EB
Selected rows, tints
Dark surface#241416
Dark-mode background
Hover#CC1832
One step down in lightness
Pressed#AC142A
Two steps down
Disabled#CBADB2
Chroma pulled out
Focus ring#F22A47
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 #e5233f

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

Works well for
  • Body text and links on white
  • Text and icons on dark surfaces
  • 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
  • Weight48/100
  • 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#23E5C9
Analogous left#E523A0
Analogous right#E56823
Split-complement 1#23E568
Split-complement 2#23A0E5
Triadic 1#3FE523
Triadic 2#233FE5
Tetradic#A0E523
On the wheel
Base+30°−30°+120°+240°+180°351°

#e5233f sits at 351°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red89.8%
Green13.7%
Blue24.7%
R · 0–255
229
0xe5
G · 0–255
35
0x23
B · 0–255
63
0x3f

CMYK percentages

Cyan0.0%
Magenta84.7%
Yellow72.5%
Key (black)10.2%

Total ink coverage is 167%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#e5233f text on a black background

contrast 4.64:1

Card sample

#e5233f text on a white background

contrast 4.52:1

Card sample

#e5233f on grey

4.13:1

#e5233f on its own surface

4.16:1

#e5233f on its dark surface

3.91:1

CSS3 live lab

Text font color

The quick brown fox

color: #e5233f;
Background color
Panel with #e5233f background
background-color: #e5233f;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #e5233f;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(229, 35, 63, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(229, 35, 63, 0.45);
Border & gradient
Gradient panel
border: 3px solid #e5233f;
background: linear-gradient(135deg, #e5233f, #E58823);
Gradient text

Gradient headline

background: linear-gradient(90deg, #e5233f, #E5B923);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #e5233f;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #e5233f;
caret-color: #e5233f;
Left rule
Pull quote or callout
border-left: 4px solid #e5233f;
Ring + tint
Selected chip
background: #FCE8EB;
box-shadow: inset 0 0 0 2px #e5233f;
Conic badge
68%
background: conic-gradient(#e5233f 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #e5233f 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(229, 35, 63, 0.5)
rgb(229 35 63 / 50%)
#e5233f80
hsl(351 79% 52% / 50%)
color-mix(in srgb, #e5233f 50%, transparent)
Alpha8-digit hexFlat on white
10%#e5233f1a#FCE9EC
20%#e5233f33#FAD3D9
40%#e5233f66#F5A7B2
60%#e5233f99#EF7B8C
80%#e5233fcc#EA4F65

Gradients from #e5233f

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, #EC5A6F, #e5233f 45%, #720D1C);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #e5233f, #D18819);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #e5233f, #23E5C9);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #EF7587 0%, #e5233f 45%, #720D1C 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%, #EA51C1 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #E8893E 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #720D1C 0%, transparent 65%), #e5233f;

Monochromatic scale

Palettes built from #e5233f

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.

#e5233f 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

Usable as-is on a dark surface at 4.64:1.

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.

#e5233f, answered

What color is #e5233f?

#e5233f is a balanced electric red, closest to Crimson (ΔE2000 2.8). It sits at 351° on the hue wheel with 79% saturation and 52% lightness, which reads as warm.

What is the RGB value of #e5233f?

rgb(229, 35, 63) — 229 red, 35 green and 63 blue out of 255, or 89.8% / 13.7% / 24.7% by channel.

What is #e5233f in HSL and HSV?

hsl(351, 79%, 52%) and hsv(351, 85%, 90%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #e5233f a light or a dark color?

It is a mid-tone. Relative luminance is 0.1822 and perceived brightness is 51%, so black text on it reaches 4.64:1.

Should I use black or white text on #e5233f?

Black. It scores 4.64:1 against #e5233f, versus 4.52:1 for white — AA at any size.

Is #e5233f accessible on a white background?

#e5233f on white scores 4.52:1, which clears AA at every size but not AAA.

What is the complementary color of #e5233f?

#23E5C9 sits directly opposite on the wheel. Softer options are the split-complements #23E568 and #23A0E5, which give the same contrast with far less vibration.

What colors go well with #e5233f?

For interface work: #FAF4F5 as the surface, #EDC0C6 for borders, #9B4B56 for secondary text, #11BB77 as an accent and #720D1C for hover and pressed states. For a palette, the analogous pair #E523A0 and #E56823 stays calm, while #23E5C9 is the loudest partner.

What is #e5233f in CMYK for printing?

cmyk(0%, 85%, 73%, 10%). 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 #e5233f 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 #E54523; nudged cooler, #E82186.

Which Tailwind color is closest to #e5233f?

The red family — its 500 step is #ef4444, ΔE2000 6.1 away. That is a visible difference, so define #e5233f as a custom token rather than reaching for the built-in.

How do I use #e5233f in Tailwind CSS?

Inline it as an arbitrary value with bg-[#e5233f] or text-[#e5233f], 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 #e5233f with 50% opacity?

rgba(229, 35, 63, 0.5), or #e5233f80 in eight-digit hex. Over white that composites to #F2919F; over black, #731220.

Is #e5233f a web-safe color?

No. The nearest web-safe colour is #CC3333, ΔE2000 5.6 away. The palette only matters for legacy displays and some email clients now.

What does the color #e5233f 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 #e5233f?

The safest is same-hue elevation: linear-gradient(135deg, #EC5A6F, #e5233f 45%, #720D1C). For more colour, a short hue run to #D18819 keeps it rich without turning muddy.

Work with #e5233f in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #e5233f at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.