#231CBC#231CBC

#231CBC is a dark, highly saturated blue. Relative luminance 0.048; OKLCH L 38.8% C 0.230 H 270.2°. Best body text is #FFFFFF at 10.69:1 contrast (WCAG AA passes).

Color values

HEX	#231CBC
RGB	rgb(35, 28, 188)
HSL	hsl(243, 74%, 42%)
HSV	hsv(243, 85%, 74%)
CMYK	cmyk(81.4%, 85.1%, 0%, 26.3%)
CIE-LAB	lab(26.21, 55.54, -79.40)
CIE-LCH	lch(26.21, 96.90, 304.97°)
OKLab	oklab(38.85% 0.0008 -0.2297)
OKLCH	oklch(38.85% 0.23 270.2)
XYZ	xyz(10.1824, 4.8175, 47.9604)
Luminance	0.0482 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231CBC #B5BC1C

analogous

#1C65BC #231CBC #731CBC

triadic

#231CBC #BC231C #1CBC23

tetradic

#231CBC #BC1C65 #B5BC1C #1CBC73

square

#231CBC #BC1C65 #B5BC1C #1CBC73

split-complementary

#231CBC #BC731C #65BC1C

monochromatic

#0F0C51 #191487 #231CBC #3C34E1 #6F6AE9

Accessibility & contrast

On white

10.69

#231CBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#231CBC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231CBC

10.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231CBC	#FFFFFF	#000000	##FFFFFF
##231CBC	1.00	10.69	1.96	10.69
#FFFFFF	10.69	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046C0

Deuteranopia (green-blind)

#0036B9

Tritanopia (blue-blind)

#005270

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #231cbc;
/* rgb */ color: rgb(35, 28, 188);
/* oklch */ color: oklch(38.8% 0.230 270.2);

Tailwind

colors: {
  custom: {
    50: '#7d5fd2',
    500: '#231cbc',
    950: '#000000',
  },
}

SCSS

$custom: #231cbc;
$custom-light: #7d5fd2;
$custom-dark: #000000;

JSON

{
  "hex": "#231cbc",
  "rgb": {
    "r": 35,
    "g": 28,
    "b": 188
  },
  "hsl": {
    "h": 242.625,
    "s": 74.074,
    "l": 42.353
  },
  "oklch": {
    "l": 0.38846,
    "c": 0.22974,
    "h": 270.2
  },
  "luminance": 0.04819
}

Semantic roles & 50–950 ramp

primary

#231CBC

secondary

#CACE65

accent

#F137E9

background

#F8F5FD

surface

#F0EAFA

border

#CBC6D3

text

#0C0514

muted

#7D7983

Preview Lab

Preview with #231CBC

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

Preview Lab → · Contrast checker → · Palette generator →