#233D8B#233D8B

#233D8B is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.9% C 0.134 H 266.3°. Best body text is #FFFFFF at 9.94:1 contrast (WCAG AA passes).

Color values

HEX	#233D8B
RGB	rgb(35, 61, 139)
HSL	hsl(225, 60%, 34%)
HSV	hsv(225, 75%, 55%)
CMYK	cmyk(74.8%, 56.1%, 0%, 45.5%)
CIE-LAB	lab(28.27, 18.97, -46.34)
CIE-LCH	lch(28.27, 50.08, 292.26°)
OKLab	oklab(38.86% -0.0087 -0.1335)
OKLCH	oklch(38.86% 0.134 266.3)
XYZ	xyz(7.0204, 5.5581, 25.1239)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233D8B #8B7123

analogous

#23718B #233D8B #3D238B

triadic

#233D8B #8B233D #3D8B23

tetradic

#233D8B #8B2371 #8B7123 #238B3D

square

#233D8B #8B2371 #8B7123 #238B3D

split-complementary

#233D8B #8B3D23 #718B23

monochromatic

#0A1229 #17285A #233D8B #2F52BC #5474D4

Accessibility & contrast

On white

9.94

#233D8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#233D8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233D8B

9.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233D8B	#FFFFFF	#000000	##FFFFFF
##233D8B	1.00	9.94	2.11	9.94
#FFFFFF	9.94	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488E

Deuteranopia (green-blind)

#003E89

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #233d8b;
/* rgb */ color: rgb(35, 61, 139);
/* oklch */ color: oklch(38.9% 0.134 266.3);

Tailwind

colors: {
  custom: {
    50: '#6d72ad',
    500: '#233d8b',
    950: '#000000',
  },
}

SCSS

$custom: #233d8b;
$custom-light: #6d72ad;
$custom-dark: #000000;

JSON

{
  "hex": "#233d8b",
  "rgb": {
    "r": 35,
    "g": 61,
    "b": 139
  },
  "hsl": {
    "h": 225,
    "s": 59.77,
    "l": 34.118
  },
  "oklch": {
    "l": 0.38858,
    "c": 0.13378,
    "h": 266.3
  },
  "luminance": 0.05559
}

Semantic roles & 50–950 ramp

primary

#233D8B

secondary

#B89E52

accent

#BB45E3

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #233D8B

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

Preview Lab → · Contrast checker → · Palette generator →