#231D8B#231D8B

#231D8B is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.1% C 0.172 H 274.1°. Best body text is #FFFFFF at 12.96:1 contrast (WCAG AA passes).

Color values

HEX	#231D8B
RGB	rgb(35, 29, 139)
HSL	hsl(243, 65%, 33%)
HSV	hsv(243, 79%, 55%)
CMYK	cmyk(74.8%, 79.1%, 0%, 45.5%)
CIE-LAB	lab(20.44, 39.69, -59.17)
CIE-LCH	lch(20.44, 71.25, 303.85°)
OKLab	oklab(33.14% 0.0122 -0.1712)
OKLCH	oklch(33.14% 0.172 274.1)
XYZ	xyz(5.7912, 3.0996, 24.7142)
Luminance	0.0310 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231D8B #858B1D

analogous

#1D4E8B #231D8B #5A1D8B

triadic

#231D8B #8B231D #1D8B23

tetradic

#231D8B #8B1D4E #858B1D #1D8B5A

square

#231D8B #8B1D4E #858B1D #1D8B5A

split-complementary

#231D8B #8B5A1D #4E8B1D

monochromatic

#090826 #161258 #231D8B #3028BE #5149D9

Accessibility & contrast

On white

12.96

#231D8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#231D8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231D8B

12.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231D8B	#FFFFFF	#000000	##FFFFFF
##231D8B	1.00	12.96	1.62	12.96
#FFFFFF	12.96	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368E

Deuteranopia (green-blind)

#002C89

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #231d8b;
/* rgb */ color: rgb(35, 29, 139);
/* oklch */ color: oklch(33.1% 0.172 274.1);

Tailwind

colors: {
  custom: {
    50: '#705bae',
    500: '#231d8b',
    950: '#000000',
  },
}

SCSS

$custom: #231d8b;
$custom-light: #705bae;
$custom-dark: #000000;

JSON

{
  "hex": "#231d8b",
  "rgb": {
    "r": 35,
    "g": 29,
    "b": 139
  },
  "hsl": {
    "h": 243.273,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.33136,
    "c": 0.17161,
    "h": 274.1
  },
  "luminance": 0.031
}

Semantic roles & 50–950 ramp

primary

#231D8B

secondary

#B5BB49

accent

#E83FDF

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #231D8B

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

Preview Lab → · Contrast checker → · Palette generator →