#231B83#231B83

#231B83 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.0% C 0.163 H 275.3°. Best body text is #FFFFFF at 13.50:1 contrast (WCAG AA passes).

Color values

HEX	#231B83
RGB	rgb(35, 27, 131)
HSL	hsl(245, 66%, 31%)
HSV	hsv(245, 79%, 51%)
CMYK	cmyk(73.3%, 79.4%, 0%, 48.6%)
CIE-LAB	lab(19.14, 38.12, -56.30)
CIE-LCH	lch(19.14, 67.99, 304.10°)
OKLab	oklab(31.95% 0.0151 -0.1628)
OKLCH	oklch(31.95% 0.163 275.3)
XYZ	xyz(5.1805, 2.7794, 21.7318)
Luminance	0.0278 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B83 #7B831B

analogous

#1B4783 #231B83 #571B83

triadic

#231B83 #83231B #1B8323

tetradic

#231B83 #831B47 #7B831B #1B8357

square

#231B83 #831B47 #7B831B #1B8357

split-complementary

#231B83 #83571B #47831B

monochromatic

#08061E #151150 #231B83 #3125B6 #4C41D8

Accessibility & contrast

On white

13.50

#231B83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#231B83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B83

13.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B83	#FFFFFF	#000000	##FFFFFF
##231B83	1.00	13.50	1.56	13.50
#FFFFFF	13.50	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003386

Deuteranopia (green-blind)

#002A81

Tritanopia (blue-blind)

#003A4E

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #231b83;
/* rgb */ color: rgb(35, 27, 131);
/* oklch */ color: oklch(32.0% 0.163 275.3);

Tailwind

colors: {
  custom: {
    50: '#6e5aa8',
    500: '#231b83',
    950: '#000000',
  },
}

SCSS

$custom: #231b83;
$custom-light: #6e5aa8;
$custom-dark: #000000;

JSON

{
  "hex": "#231b83",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 131
  },
  "hsl": {
    "h": 244.615,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.31954,
    "c": 0.16349,
    "h": 275.3
  },
  "luminance": 0.0278
}

Semantic roles & 50–950 ramp

primary

#231B83

secondary

#AEB643

accent

#E93FDC

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #231B83

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

Preview Lab → · Contrast checker → · Palette generator →