#231B4E#231B4E

#231B4E is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.5% C 0.090 H 285.7°. Best body text is #FFFFFF at 15.69:1 contrast (WCAG AA passes).

Color values

HEX	#231B4E
RGB	rgb(35, 27, 78)
HSL	hsl(249, 49%, 21%)
HSV	hsv(249, 65%, 31%)
CMYK	cmyk(55.1%, 65.4%, 0%, 69.4%)
CIE-LAB	lab(13.77, 19.56, -30.29)
CIE-LCH	lch(13.77, 36.06, 302.85°)
OKLab	oklab(26.48% 0.0243 -0.0867)
OKLCH	oklch(26.48% 0.09 285.7)
XYZ	xyz(2.4598, 1.6911, 7.4031)
Luminance	0.0169 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 7.30

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B4E #464E1B

analogous

#1B2C4E #231B4E #3C1B4E

triadic

#231B4E #4E231B #1B4E23

tetradic

#231B4E #4E1B2C #464E1B #1B4E3C

square

#231B4E #4E1B2C #464E1B #1B4E3C

split-complementary

#231B4E #4E3C1B #2C4E1B

monochromatic

#0A0817 #0F0B21 #231B4E #372B7B #4C3AA9

Accessibility & contrast

On white

15.69

#231B4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#231B4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B4E

15.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B4E	#FFFFFF	#000000	##FFFFFF
##231B4E	1.00	15.69	1.34	15.69
#FFFFFF	15.69	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002550

Deuteranopia (green-blind)

#00224D

Tritanopia (blue-blind)

#132731

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #231b4e;
/* rgb */ color: rgb(35, 27, 78);
/* oklch */ color: oklch(26.5% 0.090 285.7);

Tailwind

colors: {
  custom: {
    50: '#625780',
    500: '#231b4e',
    950: '#000000',
  },
}

SCSS

$custom: #231b4e;
$custom-light: #625780;
$custom-dark: #000000;

JSON

{
  "hex": "#231b4e",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 78
  },
  "hsl": {
    "h": 249.412,
    "s": 48.571,
    "l": 20.588
  },
  "oklch": {
    "l": 0.26482,
    "c": 0.09003,
    "h": 285.7
  },
  "luminance": 0.01691
}

Semantic roles & 50–950 ramp

primary

#231B4E

secondary

#798441

accent

#D850C3

background

#F6F5F7

surface

#EBE9EE

border

#C6C5C9

text

#05030A

muted

#7A787C

Preview Lab

Preview with #231B4E

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

Preview Lab → · Contrast checker → · Palette generator →