#231B89#231B89

#231B89 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.6% C 0.171 H 274.6°. Best body text is #FFFFFF at 13.21:1 contrast (WCAG AA passes).

Color values

HEX	#231B89
RGB	rgb(35, 27, 137)
HSL	hsl(244, 67%, 32%)
HSV	hsv(244, 80%, 54%)
CMYK	cmyk(74.5%, 80.3%, 0%, 46.3%)
CIE-LAB	lab(19.83, 40.11, -58.93)
CIE-LCH	lch(19.83, 71.28, 304.24°)
OKLab	oklab(32.64% 0.0136 -0.1704)
OKLCH	oklch(32.64% 0.171 274.6)
XYZ	xyz(5.5989, 2.9468, 23.9358)
Luminance	0.0295 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B89 #81891B

analogous

#1B4A89 #231B89 #5A1B89

triadic

#231B89 #89231B #1B8923

tetradic

#231B89 #891B4A #81891B #1B895A

square

#231B89 #891B4A #81891B #1B895A

split-complementary

#231B89 #895A1B #4A891B

monochromatic

#090723 #161156 #231B89 #3025BC #4F44DA

Accessibility & contrast

On white

13.21

#231B89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#231B89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B89

13.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B89	#FFFFFF	#000000	##FFFFFF
##231B89	1.00	13.21	1.59	13.21
#FFFFFF	13.21	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358C

Deuteranopia (green-blind)

#002B87

Tritanopia (blue-blind)

#003C52

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #231b89;
/* rgb */ color: rgb(35, 27, 137);
/* oklch */ color: oklch(32.6% 0.171 274.6);

Tailwind

colors: {
  custom: {
    50: '#705aad',
    500: '#231b89',
    950: '#000000',
  },
}

SCSS

$custom: #231b89;
$custom-light: #705aad;
$custom-dark: #000000;

JSON

{
  "hex": "#231b89",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 137
  },
  "hsl": {
    "h": 244.364,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32642,
    "c": 0.17098,
    "h": 274.6
  },
  "luminance": 0.02947
}

Semantic roles & 50–950 ramp

primary

#231B89

secondary

#B3BC44

accent

#EA3EDD

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #231B89

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

Preview Lab → · Contrast checker → · Palette generator →