#231B71#231B71

#231B71 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.0% C 0.140 H 277.9°. Best body text is #FFFFFF at 14.32:1 contrast (WCAG AA passes).

Color values

HEX	#231B71
RGB	rgb(35, 27, 113)
HSL	hsl(246, 61%, 27%)
HSV	hsv(246, 76%, 44%)
CMYK	cmyk(69%, 76.1%, 0%, 55.7%)
CIE-LAB	lab(17.15, 31.98, -48.07)
CIE-LCH	lch(17.15, 57.74, 303.63°)
OKLab	oklab(29.95% 0.0193 -0.1388)
OKLCH	oklch(29.95% 0.14 277.9)
XYZ	xyz(4.0647, 2.3331, 15.8557)
Luminance	0.0233 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B71 #69711B

analogous

#1B3E71 #231B71 #4E1B71

triadic

#231B71 #71231B #1B7123

tetradic

#231B71 #711B3E #69711B #1B714E

square

#231B71 #711B3E #69711B #1B714E

split-complementary

#231B71 #714E1B #3E711B

monochromatic

#080619 #140F40 #231B71 #3227A2 #4537CF

Accessibility & contrast

On white

14.32

#231B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#231B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B71

14.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B71	#FFFFFF	#000000	##FFFFFF
##231B71	1.00	14.32	1.47	14.32
#FFFFFF	14.32	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E74

Deuteranopia (green-blind)

#00276F

Tritanopia (blue-blind)

#003344

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #231b71;
/* rgb */ color: rgb(35, 27, 113);
/* oklch */ color: oklch(30.0% 0.140 277.9);

Tailwind

colors: {
  custom: {
    50: '#6a599b',
    500: '#231b71',
    950: '#000000',
  },
}

SCSS

$custom: #231b71;
$custom-light: #6a599b;
$custom-dark: #000000;

JSON

{
  "hex": "#231b71",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 113
  },
  "hsl": {
    "h": 245.581,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.29954,
    "c": 0.14015,
    "h": 277.9
  },
  "luminance": 0.02333
}

Semantic roles & 50–950 ramp

primary

#231B71

secondary

#9CA642

accent

#E543D6

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #231B71

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

Preview Lab → · Contrast checker → · Palette generator →