#231C99#231C99

#231C99 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.6% C 0.190 H 272.8°. Best body text is #FFFFFF at 12.37:1 contrast (WCAG AA passes).

Color values

HEX	#231C99
RGB	rgb(35, 28, 153)
HSL	hsl(243, 69%, 35%)
HSV	hsv(243, 82%, 60%)
CMYK	cmyk(77.1%, 81.7%, 0%, 40%)
CIE-LAB	lab(21.90, 44.79, -65.44)
CIE-LCH	lch(21.90, 79.30, 304.39°)
OKLab	oklab(34.64% 0.0092 -0.1893)
OKLCH	oklch(34.64% 0.19 272.8)
XYZ	xyz(6.8562, 3.4870, 30.4425)
Luminance	0.0349 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231C99 #92991C

analogous

#1C5399 #231C99 #611C99

triadic

#231C99 #99231C #1C9923

tetradic

#231C99 #991C53 #92991C #1C9961

square

#231C99 #991C53 #92991C #1C9961

split-complementary

#231C99 #99611C #53991C

monochromatic

#0B0932 #171365 #231C99 #2F25CD #5850DF

Accessibility & contrast

On white

12.37

#231C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#231C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231C99

12.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231C99	#FFFFFF	#000000	##FFFFFF
##231C99	1.00	12.37	1.70	12.37
#FFFFFF	12.37	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A9C

Deuteranopia (green-blind)

#002E97

Tritanopia (blue-blind)

#00435B

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #231c99;
/* rgb */ color: rgb(35, 28, 153);
/* oklch */ color: oklch(34.6% 0.190 272.8);

Tailwind

colors: {
  custom: {
    50: '#745cb8',
    500: '#231c99',
    950: '#000000',
  },
}

SCSS

$custom: #231c99;
$custom-light: #745cb8;
$custom-dark: #000000;

JSON

{
  "hex": "#231c99",
  "rgb": {
    "r": 35,
    "g": 28,
    "b": 153
  },
  "hsl": {
    "h": 243.36,
    "s": 69.061,
    "l": 35.49
  },
  "oklch": {
    "l": 0.34635,
    "c": 0.18956,
    "h": 272.8
  },
  "luminance": 0.03488
}

Semantic roles & 50–950 ramp

primary

#231C99

secondary

#BBC24F

accent

#EC3CE2

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231C99

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

Preview Lab → · Contrast checker → · Palette generator →