#231FAB#231FAB

#231FAB is a dark, highly saturated blue. Relative luminance 0.043; OKLCH L 37.1% C 0.208 H 271.1°. Best body text is #FFFFFF at 11.32:1 contrast (WCAG AA passes).

Color values

HEX	#231FAB
RGB	rgb(35, 31, 171)
HSL	hsl(242, 69%, 40%)
HSV	hsv(242, 82%, 67%)
CMYK	cmyk(79.5%, 81.9%, 0%, 32.9%)
CIE-LAB	lab(24.57, 49.02, -71.97)
CIE-LCH	lch(24.57, 87.08, 304.26°)
OKLab	oklab(37.11% 0.0041 -0.2083)
OKLCH	oklch(37.11% 0.208 271.1)
XYZ	xyz(8.5313, 4.2766, 38.8960)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231FAB #A7AB1F

analogous

#1F61AB #231FAB #691FAB

triadic

#231FAB #AB231F #1FAB23

tetradic

#231FAB #AB1F61 #A7AB1F #1FAB69

square

#231FAB #AB1F61 #A7AB1F #1FAB69

split-complementary

#231FAB #AB691F #61AB1F

monochromatic

#0E0C43 #181677 #231FAB #332ED9 #6662E3

Accessibility & contrast

On white

11.32

#231FAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#231FAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231FAB

11.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231FAB	#FFFFFF	#000000	##FFFFFF
##231FAB	1.00	11.32	1.86	11.32
#FFFFFF	11.32	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0041AF

Deuteranopia (green-blind)

#0033A9

Tritanopia (blue-blind)

#004C66

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #231fab;
/* rgb */ color: rgb(35, 31, 171);
/* oklch */ color: oklch(37.1% 0.208 271.1);

Tailwind

colors: {
  custom: {
    50: '#785fc5',
    500: '#231fab',
    950: '#000000',
  },
}

SCSS

$custom: #231fab;
$custom-light: #785fc5;
$custom-dark: #000000;

JSON

{
  "hex": "#231fab",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 171
  },
  "hsl": {
    "h": 241.714,
    "s": 69.307,
    "l": 39.608
  },
  "oklch": {
    "l": 0.37114,
    "c": 0.20835,
    "h": 271.1
  },
  "luminance": 0.04278
}

Semantic roles & 50–950 ramp

primary

#231FAB

secondary

#C4C75E

accent

#EC3CE7

background

#F8F5FC

surface

#EFE9F8

border

#CAC5D1

text

#0B0513

muted

#7C7982

Preview Lab

Preview with #231FAB

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

Preview Lab → · Contrast checker → · Palette generator →