#231B8A#231B8A

#231B8A is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.8% C 0.172 H 274.4°. Best body text is #FFFFFF at 13.16:1 contrast (WCAG AA passes).

Color values

HEX	#231B8A
RGB	rgb(35, 27, 138)
HSL	hsl(244, 67%, 32%)
HSV	hsv(244, 80%, 54%)
CMYK	cmyk(74.6%, 80.4%, 0%, 45.9%)
CIE-LAB	lab(19.95, 40.44, -59.36)
CIE-LCH	lch(19.95, 71.83, 304.26°)
OKLab	oklab(32.76% 0.0133 -0.1717)
OKLCH	oklch(32.76% 0.172 274.4)
XYZ	xyz(5.6710, 2.9756, 24.3153)
Luminance	0.0298 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B8A #828A1B

analogous

#1B4B8A #231B8A #5A1B8A

triadic

#231B8A #8A231B #1B8A23

tetradic

#231B8A #8A1B4B #828A1B #1B8A5A

square

#231B8A #8A1B4B #828A1B #1B8A5A

split-complementary

#231B8A #8A5A1B #4B8A1B

monochromatic

#090724 #161157 #231B8A #3025BD #5045DB

Accessibility & contrast

On white

13.16

#231B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#231B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B8A

13.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B8A	#FFFFFF	#000000	##FFFFFF
##231B8A	1.00	13.16	1.60	13.16
#FFFFFF	13.16	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358D

Deuteranopia (green-blind)

#002B88

Tritanopia (blue-blind)

#003D52

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #231b8a;
/* rgb */ color: rgb(35, 27, 138);
/* oklch */ color: oklch(32.8% 0.172 274.4);

Tailwind

colors: {
  custom: {
    50: '#705aad',
    500: '#231b8a',
    950: '#000000',
  },
}

SCSS

$custom: #231b8a;
$custom-light: #705aad;
$custom-dark: #000000;

JSON

{
  "hex": "#231b8a",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 138
  },
  "hsl": {
    "h": 244.324,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.32757,
    "c": 0.17222,
    "h": 274.4
  },
  "luminance": 0.02976
}

Semantic roles & 50–950 ramp

primary

#231B8A

secondary

#B3BC45

accent

#EA3EDE

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #231B8A

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

Preview Lab → · Contrast checker → · Palette generator →