#231BB1#231BB1

#231BB1 is a dark, highly saturated blue. Relative luminance 0.043; OKLCH L 37.4% C 0.218 H 270.9°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#231BB1
RGB	rgb(35, 27, 177)
HSL	hsl(243, 74%, 40%)
HSV	hsv(243, 85%, 69%)
CMYK	cmyk(80.2%, 84.7%, 0%, 30.6%)
CIE-LAB	lab(24.68, 52.68, -75.38)
CIE-LCH	lch(24.68, 91.96, 304.95°)
OKLab	oklab(37.41% 0.0036 -0.2181)
OKLCH	oklch(37.41% 0.218 270.9)
XYZ	xyz(9.0182, 4.3145, 41.9439)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231BB1 #A9B11B

analogous

#1B5EB1 #231BB1 #6E1BB1

triadic

#231BB1 #B1231B #1BB123

tetradic

#231BB1 #B11B5E #A9B11B #1BB16E

square

#231BB1 #B11B5E #A9B11B #1BB16E

split-complementary

#231BB1 #B16E1B #5EB11B

monochromatic

#0E0B47 #19137C #231BB1 #342BDF #6760E7

Accessibility & contrast

On white

11.27

#231BB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#231BB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231BB1

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231BB1	#FFFFFF	#000000	##FFFFFF
##231BB1	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042B5

Deuteranopia (green-blind)

#0033AF

Tritanopia (blue-blind)

#004D69

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #231bb1;
/* rgb */ color: rgb(35, 27, 177);
/* oklch */ color: oklch(37.4% 0.218 270.9);

Tailwind

colors: {
  custom: {
    50: '#7a5dca',
    500: '#231bb1',
    950: '#000000',
  },
}

SCSS

$custom: #231bb1;
$custom-light: #7a5dca;
$custom-dark: #000000;

JSON

{
  "hex": "#231bb1",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 177
  },
  "hsl": {
    "h": 243.2,
    "s": 73.529,
    "l": 40
  },
  "oklch": {
    "l": 0.37407,
    "c": 0.21812,
    "h": 270.9
  },
  "luminance": 0.04316
}

Semantic roles & 50–950 ramp

primary

#231BB1

secondary

#C5CB5D

accent

#F038E6

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0413

muted

#7C7982

Preview Lab

Preview with #231BB1

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

Preview Lab → · Contrast checker → · Palette generator →