#231C8B#231C8B

#231C8B is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.0% C 0.173 H 274.2°. Best body text is #FFFFFF at 13.04:1 contrast (WCAG AA passes).

Color values

HEX	#231C8B
RGB	rgb(35, 28, 139)
HSL	hsl(244, 66%, 33%)
HSV	hsv(244, 80%, 55%)
CMYK	cmyk(74.8%, 79.9%, 0%, 45.5%)
CIE-LAB	lab(20.25, 40.23, -59.49)
CIE-LCH	lch(20.25, 71.82, 304.07°)
OKLab	oklab(33% 0.0127 -0.1721)
OKLCH	oklch(33% 0.173 274.2)
XYZ	xyz(5.7670, 3.0513, 24.7061)
Luminance	0.0305 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231C8B #848B1C

analogous

#1C4C8B #231C8B #5B1C8B

triadic

#231C8B #8B231C #1C8B23

tetradic

#231C8B #8B1C4C #848B1C #1C8B5B

square

#231C8B #8B1C4C #848B1C #1C8B5B

split-complementary

#231C8B #8B5B1C #4C8B1C

monochromatic

#090725 #161258 #231C8B #3026BE #5147DA

Accessibility & contrast

On white

13.04

#231C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#231C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231C8B

13.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231C8B	#FFFFFF	#000000	##FFFFFF
##231C8B	1.00	13.04	1.61	13.04
#FFFFFF	13.04	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368E

Deuteranopia (green-blind)

#002C89

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #231c8b;
/* rgb */ color: rgb(35, 28, 139);
/* oklch */ color: oklch(33.0% 0.173 274.2);

Tailwind

colors: {
  custom: {
    50: '#705bae',
    500: '#231c8b',
    950: '#000000',
  },
}

SCSS

$custom: #231c8b;
$custom-light: #705bae;
$custom-dark: #000000;

JSON

{
  "hex": "#231c8b",
  "rgb": {
    "r": 35,
    "g": 28,
    "b": 139
  },
  "hsl": {
    "h": 243.784,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.33003,
    "c": 0.17254,
    "h": 274.2
  },
  "luminance": 0.03052
}

Semantic roles & 50–950 ramp

primary

#231C8B

secondary

#B4BC47

accent

#E93EDF

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #231C8B

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

Preview Lab → · Contrast checker → · Palette generator →