#231F9F#231F9F

#231F9F is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.7% C 0.194 H 272.0°. Best body text is #FFFFFF at 11.88:1 contrast (WCAG AA passes).

Color values

HEX	#231F9F
RGB	rgb(35, 31, 159)
HSL	hsl(242, 67%, 37%)
HSV	hsv(242, 81%, 62%)
CMYK	cmyk(78%, 80.5%, 0%, 37.6%)
CIE-LAB	lab(23.13, 45.19, -67.06)
CIE-LCH	lch(23.13, 80.87, 303.98°)
OKLab	oklab(35.7% 0.0068 -0.1941)
OKLCH	oklch(35.7% 0.194 272)
XYZ	xyz(7.4390, 3.8397, 33.1432)
Luminance	0.0384 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231F9F #9B9F1F

analogous

#1F5B9F #231F9F #631F9F

triadic

#231F9F #9F231F #1F9F23

tetradic

#231F9F #9F1F5B #9B9F1F #1F9F63

square

#231F9F #9F1F5B #9B9F1F #1F9F63

split-complementary

#231F9F #9F631F #5B9F1F

monochromatic

#0C0B39 #18156C #231F9F #2E29D2 #5E5ADF

Accessibility & contrast

On white

11.88

#231F9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#231F9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231F9F

11.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231F9F	#FFFFFF	#000000	##FFFFFF
##231F9F	1.00	11.88	1.77	11.88
#FFFFFF	11.88	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003DA3

Deuteranopia (green-blind)

#00319D

Tritanopia (blue-blind)

#00475F

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #231f9f;
/* rgb */ color: rgb(35, 31, 159);
/* oklch */ color: oklch(35.7% 0.194 272.0);

Tailwind

colors: {
  custom: {
    50: '#755ebd',
    500: '#231f9f',
    950: '#000000',
  },
}

SCSS

$custom: #231f9f;
$custom-light: #755ebd;
$custom-dark: #000000;

JSON

{
  "hex": "#231f9f",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 159
  },
  "hsl": {
    "h": 241.875,
    "s": 67.368,
    "l": 37.255
  },
  "oklch": {
    "l": 0.35703,
    "c": 0.19422,
    "h": 272
  },
  "luminance": 0.03841
}

Semantic roles & 50–950 ramp

primary

#231F9F

secondary

#BFC357

accent

#EA3EE5

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231F9F

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

Preview Lab → · Contrast checker → · Palette generator →