#231F9E#231F9E

#231F9E is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.6% C 0.193 H 272.1°. Best body text is #FFFFFF at 11.92:1 contrast (WCAG AA passes).

Color values

HEX	#231F9E
RGB	rgb(35, 31, 158)
HSL	hsl(242, 67%, 37%)
HSV	hsv(242, 80%, 62%)
CMYK	cmyk(77.8%, 80.4%, 0%, 38%)
CIE-LAB	lab(23.02, 44.87, -66.65)
CIE-LCH	lch(23.02, 80.35, 303.95°)
OKLab	oklab(35.59% 0.0071 -0.1929)
OKLCH	oklch(35.59% 0.193 272.1)
XYZ	xyz(7.3526, 3.8051, 32.6881)
Luminance	0.0381 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231F9E #9A9E1F

analogous

#1F5A9E #231F9E #631F9E

triadic

#231F9E #9E231F #1F9E23

tetradic

#231F9E #9E1F5A #9A9E1F #1F9E63

square

#231F9E #9E1F5A #9A9E1F #1F9E63

split-complementary

#231F9E #9E631F #5A9E1F

monochromatic

#0C0B38 #18156B #231F9E #2E29D1 #5D59DE

Accessibility & contrast

On white

11.92

#231F9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#231F9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231F9E

11.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231F9E	#FFFFFF	#000000	##FFFFFF
##231F9E	1.00	11.92	1.76	11.92
#FFFFFF	11.92	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003DA2

Deuteranopia (green-blind)

#00319C

Tritanopia (blue-blind)

#00465F

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #231f9e;
/* rgb */ color: rgb(35, 31, 158);
/* oklch */ color: oklch(35.6% 0.193 272.1);

Tailwind

colors: {
  custom: {
    50: '#755ebc',
    500: '#231f9e',
    950: '#000000',
  },
}

SCSS

$custom: #231f9e;
$custom-light: #755ebc;
$custom-dark: #000000;

JSON

{
  "hex": "#231f9e",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 158
  },
  "hsl": {
    "h": 241.89,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.35587,
    "c": 0.19303,
    "h": 272.1
  },
  "luminance": 0.03806
}

Semantic roles & 50–950 ramp

primary

#231F9E

secondary

#BFC256

accent

#EA3EE5

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231F9E

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

Preview Lab → · Contrast checker → · Palette generator →