#231FB4#231FB4

#231FB4 is a dark, highly saturated blue. Relative luminance 0.046; OKLCH L 38.2% C 0.219 H 270.5°. Best body text is #FFFFFF at 10.90:1 contrast (WCAG AA passes).

Color values

HEX	#231FB4
RGB	rgb(35, 31, 180)
HSL	hsl(242, 71%, 41%)
HSV	hsv(242, 83%, 71%)
CMYK	cmyk(80.6%, 82.8%, 0%, 29.4%)
CIE-LAB	lab(25.66, 51.82, -75.55)
CIE-LCH	lch(25.66, 91.62, 304.44°)
OKLab	oklab(38.19% 0.0021 -0.2187)
OKLCH	oklch(38.19% 0.219 270.5)
XYZ	xyz(9.4186, 4.6315, 43.5687)
Luminance	0.0463 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231FB4 #B0B41F

analogous

#1F66B4 #231FB4 #6E1FB4

triadic

#231FB4 #B4231F #1FB423

tetradic

#231FB4 #B41F66 #B0B41F #1FB46E

square

#231FB4 #B41F66 #B0B41F #1FB46E

split-complementary

#231FB4 #B46E1F #66B41F

monochromatic

#0F0D4C #191680 #231FB4 #3934DC #6C68E5

Accessibility & contrast

On white

10.90

#231FB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#231FB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231FB4

10.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231FB4	#FFFFFF	#000000	##FFFFFF
##231FB4	1.00	10.90	1.93	10.90
#FFFFFF	10.90	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B8

Deuteranopia (green-blind)

#0035B2

Tritanopia (blue-blind)

#004F6B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #231fb4;
/* rgb */ color: rgb(35, 31, 180);
/* oklch */ color: oklch(38.2% 0.219 270.5);

Tailwind

colors: {
  custom: {
    50: '#7a5fcc',
    500: '#231fb4',
    950: '#000000',
  },
}

SCSS

$custom: #231fb4;
$custom-light: #7a5fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#231fb4",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 180
  },
  "hsl": {
    "h": 241.611,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.38185,
    "c": 0.2187,
    "h": 270.5
  },
  "luminance": 0.04633
}

Semantic roles & 50–950 ramp

primary

#231FB4

secondary

#C8CB64

accent

#ED3AE9

background

#F8F5FC

surface

#EFEAF9

border

#CAC6D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #231FB4

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

Preview Lab → · Contrast checker → · Palette generator →