#231B9F#231B9F

#231B9F is a dark, vivid blue. Relative luminance 0.036; OKLCH L 35.2% C 0.197 H 272.3°. Best body text is #FFFFFF at 12.15:1 contrast (WCAG AA passes).

Color values

HEX	#231B9F
RGB	rgb(35, 27, 159)
HSL	hsl(244, 71%, 36%)
HSV	hsv(244, 83%, 62%)
CMYK	cmyk(78%, 83%, 0%, 37.6%)
CIE-LAB	lab(22.46, 47.17, -68.19)
CIE-LCH	lch(22.46, 82.92, 304.68°)
OKLab	oklab(35.23% 0.008 -0.1973)
OKLCH	oklch(35.23% 0.197 272.3)
XYZ	xyz(7.3410, 3.6436, 33.1106)
Luminance	0.0364 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B9F #979F1B

analogous

#1B559F #231B9F #651B9F

triadic

#231B9F #9F231B #1B9F23

tetradic

#231B9F #9F1B55 #979F1B #1B9F65

square

#231B9F #9F1B55 #979F1B #1B9F65

split-complementary

#231B9F #9F651B #559F1B

monochromatic

#0C0936 #17126B #231B9F #2F24D3 #5B53E2

Accessibility & contrast

On white

12.15

#231B9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#231B9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B9F

12.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B9F	#FFFFFF	#000000	##FFFFFF
##231B9F	1.00	12.15	1.73	12.15
#FFFFFF	12.15	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003CA3

Deuteranopia (green-blind)

#002F9D

Tritanopia (blue-blind)

#00455E

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #231b9f;
/* rgb */ color: rgb(35, 27, 159);
/* oklch */ color: oklch(35.2% 0.197 272.3);

Tailwind

colors: {
  custom: {
    50: '#755cbd',
    500: '#231b9f',
    950: '#000000',
  },
}

SCSS

$custom: #231b9f;
$custom-light: #755cbd;
$custom-dark: #000000;

JSON

{
  "hex": "#231b9f",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 159
  },
  "hsl": {
    "h": 243.636,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.35232,
    "c": 0.19745,
    "h": 272.3
  },
  "luminance": 0.03644
}

Semantic roles & 50–950 ramp

primary

#231B9F

secondary

#BEC551

accent

#EE3AE3

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231B9F

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

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