#231C71#231C71

#231C71 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.1% C 0.139 H 277.7°. Best body text is #FFFFFF at 14.23:1 contrast (WCAG AA passes).

Color values

HEX	#231C71
RGB	rgb(35, 28, 113)
HSL	hsl(245, 60%, 28%)
HSV	hsv(245, 75%, 44%)
CMYK	cmyk(69%, 75.2%, 0%, 55.7%)
CIE-LAB	lab(17.37, 31.37, -47.71)
CIE-LCH	lch(17.37, 57.10, 303.32°)
OKLab	oklab(30.11% 0.0186 -0.1378)
OKLCH	oklch(30.11% 0.139 277.7)
XYZ	xyz(4.0881, 2.3797, 15.8635)
Luminance	0.0238 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231C71 #6A711C

analogous

#1C4071 #231C71 #4D1C71

triadic

#231C71 #71231C #1C7123

tetradic

#231C71 #711C40 #6A711C #1C714D

square

#231C71 #711C40 #6A711C #1C714D

split-complementary

#231C71 #714D1C #40711C

monochromatic

#080619 #141040 #231C71 #3228A2 #4639CE

Accessibility & contrast

On white

14.23

#231C71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#231C71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231C71

14.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231C71	#FFFFFF	#000000	##FFFFFF
##231C71	1.00	14.23	1.48	14.23
#FFFFFF	14.23	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E74

Deuteranopia (green-blind)

#00276F

Tritanopia (blue-blind)

#003444

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #231c71;
/* rgb */ color: rgb(35, 28, 113);
/* oklch */ color: oklch(30.1% 0.139 277.7);

Tailwind

colors: {
  custom: {
    50: '#6a599b',
    500: '#231c71',
    950: '#000000',
  },
}

SCSS

$custom: #231c71;
$custom-light: #6a599b;
$custom-dark: #000000;

JSON

{
  "hex": "#231c71",
  "rgb": {
    "r": 35,
    "g": 28,
    "b": 113
  },
  "hsl": {
    "h": 244.941,
    "s": 60.284,
    "l": 27.647
  },
  "oklch": {
    "l": 0.3011,
    "c": 0.13901,
    "h": 277.7
  },
  "luminance": 0.0238
}

Semantic roles & 50–950 ramp

primary

#231C71

secondary

#9DA643

accent

#E344D6

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #231C71

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

Preview Lab → · Contrast checker → · Palette generator →