#233B81#233B81

#233B81 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.6% C 0.122 H 266.3°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#233B81
RGB	rgb(35, 59, 129)
HSL	hsl(225, 57%, 32%)
HSV	hsv(225, 73%, 51%)
CMYK	cmyk(72.9%, 54.3%, 0%, 49.4%)
CIE-LAB	lab(26.93, 16.42, -42.29)
CIE-LCH	lch(26.93, 45.36, 291.22°)
OKLab	oklab(37.6% -0.0078 -0.1216)
OKLCH	oklch(37.6% 0.122 266.3)
XYZ	xyz(6.2182, 5.0696, 21.4154)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233B81 #816923

analogous

#236A81 #233B81 #3A2381

triadic

#233B81 #81233B #3B8123

tetradic

#233B81 #81236A #816923 #23813A

square

#233B81 #81236A #816923 #23813A

split-complementary

#233B81 #813A23 #6A8123

monochromatic

#090F21 #162551 #233B81 #3051B1 #4F70CF

Accessibility & contrast

On white

10.43

#233B81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#233B81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233B81

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233B81	#FFFFFF	#000000	##FFFFFF
##233B81	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C4483

Deuteranopia (green-blind)

#003C80

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #233b81;
/* rgb */ color: rgb(35, 59, 129);
/* oklch */ color: oklch(37.6% 0.122 266.3);

Tailwind

colors: {
  custom: {
    50: '#6b70a6',
    500: '#233b81',
    950: '#000000',
  },
}

SCSS

$custom: #233b81;
$custom-light: #6b70a6;
$custom-dark: #000000;

JSON

{
  "hex": "#233b81",
  "rgb": {
    "r": 35,
    "g": 59,
    "b": 129
  },
  "hsl": {
    "h": 224.681,
    "s": 57.317,
    "l": 32.157
  },
  "oklch": {
    "l": 0.37605,
    "c": 0.12185,
    "h": 266.3
  },
  "luminance": 0.0507
}

Semantic roles & 50–950 ramp

primary

#233B81

secondary

#B3994D

accent

#B947E1

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #233B81

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

Preview Lab → · Contrast checker → · Palette generator →