#233C81#233C81

#233C81 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.8% C 0.121 H 265.8°. Best body text is #FFFFFF at 10.32:1 contrast (WCAG AA passes).

Color values

HEX	#233C81
RGB	rgb(35, 60, 129)
HSL	hsl(224, 57%, 32%)
HSV	hsv(224, 73%, 51%)
CMYK	cmyk(72.9%, 53.5%, 0%, 49.4%)
CIE-LAB	lab(27.22, 15.72, -41.82)
CIE-LCH	lch(27.22, 44.68, 290.61°)
OKLab	oklab(37.83% -0.0087 -0.1202)
OKLCH	oklch(37.83% 0.121 265.8)
XYZ	xyz(6.2701, 5.1734, 21.4327)
Luminance	0.0517 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233C81 #816823

analogous

#236B81 #233C81 #392381

triadic

#233C81 #81233C #3C8123

tetradic

#233C81 #81236B #816823 #238139

square

#233C81 #81236B #816823 #238139

split-complementary

#233C81 #813923 #6B8123

monochromatic

#090F21 #162651 #233C81 #3052B1 #4F71CF

Accessibility & contrast

On white

10.32

#233C81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#233C81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233C81

10.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233C81	#FFFFFF	#000000	##FFFFFF
##233C81	1.00	10.32	2.03	10.32
#FFFFFF	10.32	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#104583

Deuteranopia (green-blind)

#003C80

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #233c81;
/* rgb */ color: rgb(35, 60, 129);
/* oklch */ color: oklch(37.8% 0.121 265.8);

Tailwind

colors: {
  custom: {
    50: '#6b71a6',
    500: '#233c81',
    950: '#000000',
  },
}

SCSS

$custom: #233c81;
$custom-light: #6b71a6;
$custom-dark: #000000;

JSON

{
  "hex": "#233c81",
  "rgb": {
    "r": 35,
    "g": 60,
    "b": 129
  },
  "hsl": {
    "h": 224.043,
    "s": 57.317,
    "l": 32.157
  },
  "oklch": {
    "l": 0.37826,
    "c": 0.12052,
    "h": 265.8
  },
  "luminance": 0.05174
}

Semantic roles & 50–950 ramp

primary

#233C81

secondary

#B3984D

accent

#B847E1

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #233C81

Body copy rendered with the generated semantic roles for this colour.

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