#231F9A#231F9A

#231F9A is a dark, vivid blue. Relative luminance 0.037; OKLCH L 35.1% C 0.188 H 272.4°. Best body text is #FFFFFF at 12.11:1 contrast (WCAG AA passes).

Color values

HEX	#231F9A
RGB	rgb(35, 31, 154)
HSL	hsl(242, 66%, 36%)
HSV	hsv(242, 80%, 60%)
CMYK	cmyk(77.3%, 79.9%, 0%, 39.6%)
CIE-LAB	lab(22.55, 43.57, -64.97)
CIE-LCH	lch(22.55, 78.23, 303.84°)
OKLab	oklab(35.12% 0.008 -0.188)
OKLCH	oklch(35.12% 0.188 272.4)
XYZ	xyz(7.0139, 3.6696, 30.9042)
Luminance	0.0367 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231F9A #969A1F

analogous

#1F599A #231F9A #611F9A

triadic

#231F9A #9A231F #1F9A23

tetradic

#231F9A #9A1F59 #969A1F #1F9A61

square

#231F9A #9A1F59 #969A1F #1F9A61

split-complementary

#231F9A #9A611F #599A1F

monochromatic

#0C0A34 #171567 #231F9A #2F29CD #5B56DD

Accessibility & contrast

On white

12.11

#231F9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#231F9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231F9A

12.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231F9A	#FFFFFF	#000000	##FFFFFF
##231F9A	1.00	12.11	1.73	12.11
#FFFFFF	12.11	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C9D

Deuteranopia (green-blind)

#003098

Tritanopia (blue-blind)

#00455C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #231f9a;
/* rgb */ color: rgb(35, 31, 154);
/* oklch */ color: oklch(35.1% 0.188 272.4);

Tailwind

colors: {
  custom: {
    50: '#745db9',
    500: '#231f9a',
    950: '#000000',
  },
}

SCSS

$custom: #231f9a;
$custom-light: #745db9;
$custom-dark: #000000;

JSON

{
  "hex": "#231f9a",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 154
  },
  "hsl": {
    "h": 241.951,
    "s": 66.486,
    "l": 36.275
  },
  "oklch": {
    "l": 0.35123,
    "c": 0.18821,
    "h": 272.4
  },
  "luminance": 0.0367
}

Semantic roles & 50–950 ramp

primary

#231F9A

secondary

#BDC154

accent

#E93EE4

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231F9A

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

Preview Lab → · Contrast checker → · Palette generator →