#231DA0#231DA0

#231DA0 is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.6% C 0.197 H 272.1°. Best body text is #FFFFFF at 11.97:1 contrast (WCAG AA passes).

Color values

HEX	#231DA0
RGB	rgb(35, 29, 160)
HSL	hsl(243, 69%, 37%)
HSV	hsv(243, 82%, 63%)
CMYK	cmyk(78.1%, 81.9%, 0%, 37.3%)
CIE-LAB	lab(22.91, 46.52, -68.05)
CIE-LCH	lch(22.91, 82.43, 304.36°)
OKLab	oklab(35.58% 0.0072 -0.1969)
OKLCH	oklch(35.58% 0.197 272.1)
XYZ	xyz(7.4755, 3.7733, 33.5852)
Luminance	0.0377 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231DA0 #9AA01D

analogous

#1D59A0 #231DA0 #651DA0

triadic

#231DA0 #A0231D #1DA023

tetradic

#231DA0 #A01D59 #9AA01D #1DA065

square

#231DA0 #A01D59 #9AA01D #1DA065

split-complementary

#231DA0 #A0651D #59A01D

monochromatic

#0C0A38 #18146C #231DA0 #2E26D4 #5D57E1

Accessibility & contrast

On white

11.97

#231DA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#231DA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231DA0

11.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231DA0	#FFFFFF	#000000	##FFFFFF
##231DA0	1.00	11.97	1.75	11.97
#FFFFFF	11.97	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	11.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003DA4

Deuteranopia (green-blind)

#00309E

Tritanopia (blue-blind)

#00465F

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #231da0;
/* rgb */ color: rgb(35, 29, 160);
/* oklch */ color: oklch(35.6% 0.197 272.1);

Tailwind

colors: {
  custom: {
    50: '#755dbd',
    500: '#231da0',
    950: '#000000',
  },
}

SCSS

$custom: #231da0;
$custom-light: #755dbd;
$custom-dark: #000000;

JSON

{
  "hex": "#231da0",
  "rgb": {
    "r": 35,
    "g": 29,
    "b": 160
  },
  "hsl": {
    "h": 242.748,
    "s": 69.312,
    "l": 37.059
  },
  "oklch": {
    "l": 0.3558,
    "c": 0.19706,
    "h": 272.1
  },
  "luminance": 0.03774
}

Semantic roles & 50–950 ramp

primary

#231DA0

secondary

#BFC455

accent

#EC3CE4

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231DA0

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

Preview Lab → · Contrast checker → · Palette generator →