#233D81#233D81

#233D81 is a dark, moderate blue. Relative luminance 0.053; OKLCH L 38.0% C 0.119 H 265.4°. Best body text is #FFFFFF at 10.21:1 contrast (WCAG AA passes).

Color values

HEX	#233D81
RGB	rgb(35, 61, 129)
HSL	hsl(223, 57%, 32%)
HSV	hsv(223, 73%, 51%)
CMYK	cmyk(72.9%, 52.7%, 0%, 49.4%)
CIE-LAB	lab(27.52, 15.03, -41.35)
CIE-LCH	lch(27.52, 43.99, 289.97°)
OKLab	oklab(38.05% -0.0097 -0.1188)
OKLCH	oklch(38.05% 0.119 265.4)
XYZ	xyz(6.3229, 5.2791, 21.4504)
Luminance	0.0528 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233D81 #816723

analogous

#236C81 #233D81 #382381

triadic

#233D81 #81233D #3D8123

tetradic

#233D81 #81236C #816723 #238138

square

#233D81 #81236C #816723 #238138

split-complementary

#233D81 #813823 #6C8123

monochromatic

#090F21 #162651 #233D81 #3054B1 #4F73CF

Accessibility & contrast

On white

10.21

#233D81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#233D81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233D81

10.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233D81	#FFFFFF	#000000	##FFFFFF
##233D81	1.00	10.21	2.06	10.21
#FFFFFF	10.21	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#134683

Deuteranopia (green-blind)

#003D80

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #233d81;
/* rgb */ color: rgb(35, 61, 129);
/* oklch */ color: oklch(38.0% 0.119 265.4);

Tailwind

colors: {
  custom: {
    50: '#6b72a6',
    500: '#233d81',
    950: '#000000',
  },
}

SCSS

$custom: #233d81;
$custom-light: #6b72a6;
$custom-dark: #000000;

JSON

{
  "hex": "#233d81",
  "rgb": {
    "r": 35,
    "g": 61,
    "b": 129
  },
  "hsl": {
    "h": 223.404,
    "s": 57.317,
    "l": 32.157
  },
  "oklch": {
    "l": 0.38048,
    "c": 0.11918,
    "h": 265.4
  },
  "luminance": 0.0528
}

Semantic roles & 50–950 ramp

primary

#233D81

secondary

#B3974D

accent

#B647E1

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #233D81

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

Preview Lab → · Contrast checker → · Palette generator →