#231B8D#231B8D

#231B8D is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.1% C 0.176 H 274.1°. Best body text is #FFFFFF at 13.02:1 contrast (WCAG AA passes).

Color values

HEX	#231B8D
RGB	rgb(35, 27, 141)
HSL	hsl(244, 68%, 33%)
HSV	hsv(244, 81%, 55%)
CMYK	cmyk(75.2%, 80.9%, 0%, 44.7%)
CIE-LAB	lab(20.30, 41.42, -60.66)
CIE-LCH	lch(20.30, 73.45, 304.33°)
OKLab	oklab(33.11% 0.0126 -0.1755)
OKLCH	oklch(33.11% 0.176 274.1)
XYZ	xyz(5.8912, 3.0637, 25.4750)
Luminance	0.0306 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B8D #858D1B

analogous

#1B4C8D #231B8D #5C1B8D

triadic

#231B8D #8D231B #1B8D23

tetradic

#231B8D #8D1B4C #858D1B #1B8D5C

square

#231B8D #8D1B4C #858D1B #1B8D5C

split-complementary

#231B8D #8D5C1B #4C8D1B

monochromatic

#0A0726 #16115A #231B8D #3025C0 #5147DC

Accessibility & contrast

On white

13.02

#231B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#231B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B8D

13.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B8D	#FFFFFF	#000000	##FFFFFF
##231B8D	1.00	13.02	1.61	13.02
#FFFFFF	13.02	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003690

Deuteranopia (green-blind)

#002C8B

Tritanopia (blue-blind)

#003E54

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #231b8d;
/* rgb */ color: rgb(35, 27, 141);
/* oklch */ color: oklch(33.1% 0.176 274.1);

Tailwind

colors: {
  custom: {
    50: '#715ab0',
    500: '#231b8d',
    950: '#000000',
  },
}

SCSS

$custom: #231b8d;
$custom-light: #715ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#231b8d",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 141
  },
  "hsl": {
    "h": 244.211,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.33105,
    "c": 0.17591,
    "h": 274.1
  },
  "luminance": 0.03064
}

Semantic roles & 50–950 ramp

primary

#231B8D

secondary

#B5BD46

accent

#EB3DDF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #231B8D

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

Preview Lab → · Contrast checker → · Palette generator →