#233B71#233B71

#233B71 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.4% C 0.098 H 264.1°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#233B71
RGB	rgb(35, 59, 113)
HSL	hsl(222, 53%, 29%)
HSV	hsv(222, 69%, 44%)
CMYK	cmyk(69%, 47.8%, 0%, 55.7%)
CIE-LAB	lab(25.79, 10.11, -34.02)
CIE-LCH	lch(25.79, 35.49, 286.55°)
OKLab	oklab(36.37% -0.01 -0.0973)
OKLCH	oklch(36.37% 0.098 264.1)
XYZ	xyz(5.2367, 4.6770, 16.2464)
Luminance	0.0468 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233B71 #715923

analogous

#236271 #233B71 #322371

triadic

#233B71 #71233B #3B7123

tetradic

#233B71 #712362 #715923 #237132

square

#233B71 #712362 #715923 #237132

split-complementary

#233B71 #713223 #627123

monochromatic

#070C17 #152342 #233B71 #3153A0 #486FC6

Accessibility & contrast

On white

10.85

#233B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#233B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233B71

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233B71	#FFFFFF	#000000	##FFFFFF
##233B71	1.00	10.85	1.94	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204173

Deuteranopia (green-blind)

#123A70

Tritanopia (blue-blind)

#004750

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #233b71;
/* rgb */ color: rgb(35, 59, 113);
/* oklch */ color: oklch(36.4% 0.098 264.1);

Tailwind

colors: {
  custom: {
    50: '#67709a',
    500: '#233b71',
    950: '#000000',
  },
}

SCSS

$custom: #233b71;
$custom-light: #67709a;
$custom-dark: #000000;

JSON

{
  "hex": "#233b71",
  "rgb": {
    "r": 35,
    "g": 59,
    "b": 113
  },
  "hsl": {
    "h": 221.538,
    "s": 52.703,
    "l": 29.02
  },
  "oklch": {
    "l": 0.36374,
    "c": 0.09778,
    "h": 264.1
  },
  "luminance": 0.04678
}

Semantic roles & 50–950 ramp

primary

#233B71

secondary

#A4894C

accent

#B04CDC

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #233B71

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

Preview Lab → · Contrast checker → · Palette generator →