#231C81#231C81

#231C81 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.9% C 0.160 H 275.4°. Best body text is #FFFFFF at 13.51:1 contrast (WCAG AA passes).

Color values

HEX	#231C81
RGB	rgb(35, 28, 129)
HSL	hsl(244, 64%, 31%)
HSV	hsv(244, 78%, 51%)
CMYK	cmyk(72.9%, 78.3%, 0%, 49.4%)
CIE-LAB	lab(19.11, 36.88, -55.08)
CIE-LCH	lch(19.11, 66.29, 303.81°)
OKLab	oklab(31.87% 0.015 -0.1593)
OKLCH	oklch(31.87% 0.16 275.4)
XYZ	xyz(5.0695, 2.7723, 21.0326)
Luminance	0.0277 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231C81 #7A811C

analogous

#1C4781 #231C81 #551C81

triadic

#231C81 #81231C #1C8123

tetradic

#231C81 #811C47 #7A811C #1C8155

square

#231C81 #811C47 #7A811C #1C8155

split-complementary

#231C81 #81551C #47811C

monochromatic

#08061C #15114F #231C81 #3127B3 #4C42D6

Accessibility & contrast

On white

13.51

#231C81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#231C81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231C81

13.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231C81	#FFFFFF	#000000	##FFFFFF
##231C81	1.00	13.51	1.55	13.51
#FFFFFF	13.51	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003384

Deuteranopia (green-blind)

#002A7F

Tritanopia (blue-blind)

#003A4D

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #231c81;
/* rgb */ color: rgb(35, 28, 129);
/* oklch */ color: oklch(31.9% 0.160 275.4);

Tailwind

colors: {
  custom: {
    50: '#6e5aa7',
    500: '#231c81',
    950: '#000000',
  },
}

SCSS

$custom: #231c81;
$custom-light: #6e5aa7;
$custom-dark: #000000;

JSON

{
  "hex": "#231c81",
  "rgb": {
    "r": 35,
    "g": 28,
    "b": 129
  },
  "hsl": {
    "h": 244.158,
    "s": 64.331,
    "l": 30.784
  },
  "oklch": {
    "l": 0.31866,
    "c": 0.15997,
    "h": 275.4
  },
  "luminance": 0.02773
}

Semantic roles & 50–950 ramp

primary

#231C81

secondary

#ADB444

accent

#E740DC

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #231C81

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

Preview Lab → · Contrast checker → · Palette generator →