#231F9C#231F9C

#231F9C is a dark, vivid blue. Relative luminance 0.037; OKLCH L 35.4% C 0.191 H 272.3°. Best body text is #FFFFFF at 12.02:1 contrast (WCAG AA passes).

Color values

HEX	#231F9C
RGB	rgb(35, 31, 156)
HSL	hsl(242, 67%, 37%)
HSV	hsv(242, 80%, 61%)
CMYK	cmyk(77.6%, 80.1%, 0%, 38.8%)
CIE-LAB	lab(22.78, 44.22, -65.81)
CIE-LCH	lch(22.78, 79.29, 303.90°)
OKLab	oklab(35.35% 0.0075 -0.1905)
OKLCH	oklch(35.35% 0.191 272.3)
XYZ	xyz(7.1819, 3.7368, 31.7888)
Luminance	0.0374 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231F9C #989C1F

analogous

#1F5A9C #231F9C #621F9C

triadic

#231F9C #9C231F #1F9C23

tetradic

#231F9C #9C1F5A #989C1F #1F9C62

square

#231F9C #9C1F5A #989C1F #1F9C62

split-complementary

#231F9C #9C621F #5A9C1F

monochromatic

#0C0B36 #181569 #231F9C #2E29CF #5C58DE

Accessibility & contrast

On white

12.02

#231F9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#231F9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231F9C

12.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231F9C	#FFFFFF	#000000	##FFFFFF
##231F9C	1.00	12.02	1.75	12.02
#FFFFFF	12.02	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C9F

Deuteranopia (green-blind)

#00309A

Tritanopia (blue-blind)

#00465D

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #231f9c;
/* rgb */ color: rgb(35, 31, 156);
/* oklch */ color: oklch(35.4% 0.191 272.3);

Tailwind

colors: {
  custom: {
    50: '#745ebb',
    500: '#231f9c',
    950: '#000000',
  },
}

SCSS

$custom: #231f9c;
$custom-light: #745ebb;
$custom-dark: #000000;

JSON

{
  "hex": "#231f9c",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 156
  },
  "hsl": {
    "h": 241.92,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.35354,
    "c": 0.19063,
    "h": 272.3
  },
  "luminance": 0.03738
}

Semantic roles & 50–950 ramp

primary

#231F9C

secondary

#BEC155

accent

#EA3EE4

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231F9C

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

Preview Lab → · Contrast checker → · Palette generator →