#231F77#231F77

#231F77 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.2% C 0.144 H 276.1°. Best body text is #FFFFFF at 13.69:1 contrast (WCAG AA passes).

Color values

HEX	#231F77
RGB	rgb(35, 31, 119)
HSL	hsl(243, 59%, 29%)
HSV	hsv(243, 74%, 47%)
CMYK	cmyk(70.6%, 73.9%, 0%, 53.3%)
CIE-LAB	lab(18.67, 31.62, -49.44)
CIE-LCH	lch(18.67, 58.69, 302.60°)
OKLab	oklab(31.23% 0.0153 -0.1428)
OKLCH	oklch(31.23% 0.144 276.1)
XYZ	xyz(4.5118, 2.6688, 17.7265)
Luminance	0.0267 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231F77 #73771F

analogous

#1F4777 #231F77 #4F1F77

triadic

#231F77 #77231F #1F7723

tetradic

#231F77 #771F47 #73771F #1F774F

square

#231F77 #771F47 #73771F #1F774F

split-complementary

#231F77 #774F1F #47771F

monochromatic

#070618 #151246 #231F77 #312CA8 #4943CE

Accessibility & contrast

On white

13.69

#231F77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#231F77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231F77

13.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231F77	#FFFFFF	#000000	##FFFFFF
##231F77	1.00	13.69	1.53	13.69
#FFFFFF	13.69	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00317A

Deuteranopia (green-blind)

#002A75

Tritanopia (blue-blind)

#003748

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #231f77;
/* rgb */ color: rgb(35, 31, 119);
/* oklch */ color: oklch(31.2% 0.144 276.1);

Tailwind

colors: {
  custom: {
    50: '#6b5c9f',
    500: '#231f77',
    950: '#000000',
  },
}

SCSS

$custom: #231f77;
$custom-light: #6b5c9f;
$custom-dark: #000000;

JSON

{
  "hex": "#231f77",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 119
  },
  "hsl": {
    "h": 242.727,
    "s": 58.667,
    "l": 29.412
  },
  "oklch": {
    "l": 0.31228,
    "c": 0.14365,
    "h": 276.1
  },
  "luminance": 0.02669
}

Semantic roles & 50–950 ramp

primary

#231F77

secondary

#A6AB47

accent

#E246DB

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#08040F

muted

#7A797E

Preview Lab

Preview with #231F77

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

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