#231D9A#231D9A

#231D9A is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.9% C 0.190 H 272.6°. Best body text is #FFFFFF at 12.25:1 contrast (WCAG AA passes).

Color values

HEX	#231D9A
RGB	rgb(35, 29, 154)
HSL	hsl(243, 68%, 36%)
HSV	hsv(243, 81%, 60%)
CMYK	cmyk(77.3%, 81.2%, 0%, 39.6%)
CIE-LAB	lab(22.19, 44.60, -65.57)
CIE-LCH	lch(22.19, 79.30, 304.23°)
OKLab	oklab(34.87% 0.0087 -0.1897)
OKLCH	oklch(34.87% 0.19 272.6)
XYZ	xyz(6.9633, 3.5684, 30.8874)
Luminance	0.0357 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231D9A #949A1D

analogous

#1D559A #231D9A #611D9A

triadic

#231D9A #9A231D #1D9A23

tetradic

#231D9A #9A1D55 #949A1D #1D9A61

square

#231D9A #9A1D55 #949A1D #1D9A61

split-complementary

#231D9A #9A611D #559A1D

monochromatic

#0C0A33 #171366 #231D9A #2F27CE #5A53DF

Accessibility & contrast

On white

12.25

#231D9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#231D9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231D9A

12.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231D9A	#FFFFFF	#000000	##FFFFFF
##231D9A	1.00	12.25	1.71	12.25
#FFFFFF	12.25	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B9D

Deuteranopia (green-blind)

#002F98

Tritanopia (blue-blind)

#00445C

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #231d9a;
/* rgb */ color: rgb(35, 29, 154);
/* oklch */ color: oklch(34.9% 0.190 272.6);

Tailwind

colors: {
  custom: {
    50: '#745cb9',
    500: '#231d9a',
    950: '#000000',
  },
}

SCSS

$custom: #231d9a;
$custom-light: #745cb9;
$custom-dark: #000000;

JSON

{
  "hex": "#231d9a",
  "rgb": {
    "r": 35,
    "g": 29,
    "b": 154
  },
  "hsl": {
    "h": 242.88,
    "s": 68.306,
    "l": 35.882
  },
  "oklch": {
    "l": 0.34873,
    "c": 0.18993,
    "h": 272.6
  },
  "luminance": 0.03569
}

Semantic roles & 50–950 ramp

primary

#231D9A

secondary

#BCC251

accent

#EB3DE3

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231D9A

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

Preview Lab → · Contrast checker → · Palette generator →