#231F71#231F71

#231F71 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.6% C 0.135 H 276.9°. Best body text is #FFFFFF at 13.94:1 contrast (WCAG AA passes).

Color values

HEX	#231F71
RGB	rgb(35, 31, 113)
HSL	hsl(243, 57%, 28%)
HSV	hsv(243, 73%, 44%)
CMYK	cmyk(69%, 72.6%, 0%, 55.7%)
CIE-LAB	lab(18.05, 29.48, -46.59)
CIE-LCH	lch(18.05, 55.13, 302.32°)
OKLab	oklab(30.6% 0.0163 -0.1345)
OKLCH	oklch(30.6% 0.135 276.9)
XYZ	xyz(4.1628, 2.5292, 15.8884)
Luminance	0.0253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231F71 #6D711F

analogous

#1F4471 #231F71 #4C1F71

triadic

#231F71 #71231F #1F7123

tetradic

#231F71 #711F44 #6D711F #1F714C

square

#231F71 #711F44 #6D711F #1F714C

split-complementary

#231F71 #714C1F #44711F

monochromatic

#070718 #141241 #231F71 #322CA1 #4740CB

Accessibility & contrast

On white

13.94

#231F71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#231F71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231F71

13.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231F71	#FFFFFF	#000000	##FFFFFF
##231F71	1.00	13.94	1.51	13.94
#FFFFFF	13.94	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003073

Deuteranopia (green-blind)

#00296F

Tritanopia (blue-blind)

#003545

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #231f71;
/* rgb */ color: rgb(35, 31, 113);
/* oklch */ color: oklch(30.6% 0.135 276.9);

Tailwind

colors: {
  custom: {
    50: '#695b9b',
    500: '#231f71',
    950: '#000000',
  },
}

SCSS

$custom: #231f71;
$custom-light: #695b9b;
$custom-dark: #000000;

JSON

{
  "hex": "#231f71",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 113
  },
  "hsl": {
    "h": 242.927,
    "s": 56.944,
    "l": 28.235
  },
  "oklch": {
    "l": 0.306,
    "c": 0.13548,
    "h": 276.9
  },
  "luminance": 0.0253
}

Semantic roles & 50–950 ramp

primary

#231F71

secondary

#A0A547

accent

#E048D9

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #231F71

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

Preview Lab → · Contrast checker → · Palette generator →