#231B87#231B87

#231B87 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.4% C 0.169 H 274.8°. Best body text is #FFFFFF at 13.31:1 contrast (WCAG AA passes).

Color values

HEX	#231B87
RGB	rgb(35, 27, 135)
HSL	hsl(244, 67%, 32%)
HSV	hsv(244, 80%, 53%)
CMYK	cmyk(74.1%, 80%, 0%, 47.1%)
CIE-LAB	lab(19.60, 39.45, -58.06)
CIE-LCH	lch(19.60, 70.19, 304.20°)
OKLab	oklab(32.41% 0.0141 -0.1679)
OKLCH	oklch(32.41% 0.169 274.8)
XYZ	xyz(5.4568, 2.8899, 23.1872)
Luminance	0.0289 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B87 #7F871B

analogous

#1B4987 #231B87 #591B87

triadic

#231B87 #87231B #1B8723

tetradic

#231B87 #871B49 #7F871B #1B8759

square

#231B87 #871B49 #7F871B #1B8759

split-complementary

#231B87 #87591B #49871B

monochromatic

#090721 #161154 #231B87 #3025BA #4E43D9

Accessibility & contrast

On white

13.31

#231B87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#231B87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B87

13.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B87	#FFFFFF	#000000	##FFFFFF
##231B87	1.00	13.31	1.58	13.31
#FFFFFF	13.31	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348A

Deuteranopia (green-blind)

#002A85

Tritanopia (blue-blind)

#003C51

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #231b87;
/* rgb */ color: rgb(35, 27, 135);
/* oklch */ color: oklch(32.4% 0.169 274.8);

Tailwind

colors: {
  custom: {
    50: '#6f5aab',
    500: '#231b87',
    950: '#000000',
  },
}

SCSS

$custom: #231b87;
$custom-light: #6f5aab;
$custom-dark: #000000;

JSON

{
  "hex": "#231b87",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 135
  },
  "hsl": {
    "h": 244.444,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.32411,
    "c": 0.1685,
    "h": 274.8
  },
  "luminance": 0.0289
}

Semantic roles & 50–950 ramp

primary

#231B87

secondary

#B1BA44

accent

#EA3EDD

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #231B87

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

Preview Lab → · Contrast checker → · Palette generator →