#231B5D#231B5D

#231B5D is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.9% C 0.112 H 281.8°. Best body text is #FFFFFF at 15.15:1 contrast (WCAG AA passes).

Color values

HEX	#231B5D
RGB	rgb(35, 27, 93)
HSL	hsl(247, 55%, 24%)
HSV	hsv(247, 71%, 36%)
CMYK	cmyk(62.4%, 71%, 0%, 63.5%)
CIE-LAB	lab(15.12, 24.92, -38.25)
CIE-LCH	lch(15.12, 45.65, 303.08°)
OKLab	oklab(27.89% 0.0229 -0.1101)
OKLCH	oklch(27.89% 0.112 281.8)
XYZ	xyz(3.0602, 1.9313, 10.5653)
Luminance	0.0193 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B5D #555D1B

analogous

#1B345D #231B5D #441B5D

triadic

#231B5D #5D231B #1B5D23

tetradic

#231B5D #5D1B34 #555D1B #1B5D44

square

#231B5D #5D1B34 #555D1B #1B5D44

split-complementary

#231B5D #5D441B #345D1B

monochromatic

#090718 #110D2E #231B5D #35298C #4737BC

Accessibility & contrast

On white

15.15

#231B5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#231B5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B5D

15.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B5D	#FFFFFF	#000000	##FFFFFF
##231B5D	1.00	15.15	1.39	15.15
#FFFFFF	15.15	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285F

Deuteranopia (green-blind)

#00245C

Tritanopia (blue-blind)

#022C39

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #231b5d;
/* rgb */ color: rgb(35, 27, 93);
/* oklch */ color: oklch(27.9% 0.112 281.8);

Tailwind

colors: {
  custom: {
    50: '#65588c',
    500: '#231b5d',
    950: '#000000',
  },
}

SCSS

$custom: #231b5d;
$custom-light: #65588c;
$custom-dark: #000000;

JSON

{
  "hex": "#231b5d",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 93
  },
  "hsl": {
    "h": 247.273,
    "s": 55,
    "l": 23.529
  },
  "oklch": {
    "l": 0.27886,
    "c": 0.11242,
    "h": 281.8
  },
  "luminance": 0.01932
}

Semantic roles & 50–950 ramp

primary

#231B5D

secondary

#899341

accent

#DE49CC

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #231B5D

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

Preview Lab → · Contrast checker → · Palette generator →