#231DB3#231DB3

#231DB3 is a dark, highly saturated blue. Relative luminance 0.045; OKLCH L 37.9% C 0.219 H 270.7°. Best body text is #FFFFFF at 11.06:1 contrast (WCAG AA passes).

Color values

HEX	#231DB3
RGB	rgb(35, 29, 179)
HSL	hsl(242, 72%, 41%)
HSV	hsv(242, 84%, 70%)
CMYK	cmyk(80.4%, 83.8%, 0%, 29.8%)
CIE-LAB	lab(25.23, 52.41, -75.67)
CIE-LCH	lch(25.23, 92.05, 304.71°)
OKLab	oklab(37.85% 0.0027 -0.219)
OKLCH	oklch(37.85% 0.219 270.7)
XYZ	xyz(9.2664, 4.4897, 43.0173)
Luminance	0.0449 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231DB3 #ADB31D

analogous

#1D62B3 #231DB3 #6E1DB3

triadic

#231DB3 #B3231D #1DB323

tetradic

#231DB3 #B31D62 #ADB31D #1DB36E

square

#231DB3 #B31D62 #ADB31D #1DB36E

split-complementary

#231DB3 #B36E1D #62B31D

monochromatic

#0E0C4A #19147E #231DB3 #3730DD #6A64E6

Accessibility & contrast

On white

11.06

#231DB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#231DB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231DB3

11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231DB3	#FFFFFF	#000000	##FFFFFF
##231DB3	1.00	11.06	1.90	11.06
#FFFFFF	11.06	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043B7

Deuteranopia (green-blind)

#0034B1

Tritanopia (blue-blind)

#004E6A

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #231db3;
/* rgb */ color: rgb(35, 29, 179);
/* oklch */ color: oklch(37.9% 0.219 270.7);

Tailwind

colors: {
  custom: {
    50: '#7a5ecb',
    500: '#231db3',
    950: '#000000',
  },
}

SCSS

$custom: #231db3;
$custom-light: #7a5ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#231db3",
  "rgb": {
    "r": 35,
    "g": 29,
    "b": 179
  },
  "hsl": {
    "h": 242.4,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.37852,
    "c": 0.219,
    "h": 270.7
  },
  "luminance": 0.04491
}

Semantic roles & 50–950 ramp

primary

#231DB3

secondary

#C7CB61

accent

#EF39E8

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #231DB3

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

Preview Lab → · Contrast checker → · Palette generator →