#231781#231781

#231781 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.2% C 0.165 H 276.1°. Best body text is #FFFFFF at 13.90:1 contrast (WCAG AA passes).

Color values

HEX	#231781
RGB	rgb(35, 23, 129)
HSL	hsl(247, 70%, 30%)
HSV	hsv(247, 82%, 51%)
CMYK	cmyk(72.9%, 82.2%, 0%, 49.4%)
CIE-LAB	lab(18.16, 39.60, -56.64)
CIE-LCH	lch(18.16, 69.11, 304.96°)
OKLab	oklab(31.21% 0.0175 -0.1637)
OKLCH	oklch(31.21% 0.165 276.1)
XYZ	xyz(4.9607, 2.5546, 20.9963)
Luminance	0.0255 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231781 #758117

analogous

#174081 #231781 #581781

triadic

#231781 #812317 #178123

tetradic

#231781 #811740 #758117 #178158

square

#231781 #811740 #758117 #178158

split-complementary

#231781 #815817 #408117

monochromatic

#07051A #150E4D #231781 #3120B5 #4A37DB

Accessibility & contrast

On white

13.90

#231781 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#231781 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231781

13.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231781	#FFFFFF	#000000	##FFFFFF
##231781	1.00	13.90	1.51	13.90
#FFFFFF	13.90	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003184

Deuteranopia (green-blind)

#00287F

Tritanopia (blue-blind)

#00384C

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #231781;
/* rgb */ color: rgb(35, 23, 129);
/* oklch */ color: oklch(31.2% 0.165 276.1);

Tailwind

colors: {
  custom: {
    50: '#6e57a7',
    500: '#231781',
    950: '#000000',
  },
}

SCSS

$custom: #231781;
$custom-light: #6e57a7;
$custom-dark: #000000;

JSON

{
  "hex": "#231781",
  "rgb": {
    "r": 35,
    "g": 23,
    "b": 129
  },
  "hsl": {
    "h": 246.792,
    "s": 69.737,
    "l": 29.804
  },
  "oklch": {
    "l": 0.31205,
    "c": 0.16467,
    "h": 276.1
  },
  "luminance": 0.02555
}

Semantic roles & 50–950 ramp

primary

#231781

secondary

#A8B53E

accent

#ED3BD8

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #231781

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

Preview Lab → · Contrast checker → · Palette generator →