#231FA0#231FA0

#231FA0 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.8% C 0.195 H 271.9°. Best body text is #FFFFFF at 11.83:1 contrast (WCAG AA passes).

Color values

HEX	#231FA0
RGB	rgb(35, 31, 160)
HSL	hsl(242, 68%, 37%)
HSV	hsv(242, 81%, 63%)
CMYK	cmyk(78.1%, 80.6%, 0%, 37.3%)
CIE-LAB	lab(23.25, 45.52, -67.48)
CIE-LCH	lch(23.25, 81.40, 304.00°)
OKLab	oklab(35.82% 0.0066 -0.1953)
OKLCH	oklch(35.82% 0.195 271.9)
XYZ	xyz(7.5262, 3.8745, 33.6021)
Luminance	0.0387 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231FA0 #9CA01F

analogous

#1F5CA0 #231FA0 #631FA0

triadic

#231FA0 #A0231F #1FA023

tetradic

#231FA0 #A01F5C #9CA01F #1FA063

square

#231FA0 #A01F5C #9CA01F #1FA063

split-complementary

#231FA0 #A0631F #5CA01F

monochromatic

#0D0B39 #18156D #231FA0 #2E29D3 #5E5ADF

Accessibility & contrast

On white

11.83

#231FA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#231FA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231FA0

11.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231FA0	#FFFFFF	#000000	##FFFFFF
##231FA0	1.00	11.83	1.78	11.83
#FFFFFF	11.83	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA4

Deuteranopia (green-blind)

#00319E

Tritanopia (blue-blind)

#004760

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #231fa0;
/* rgb */ color: rgb(35, 31, 160);
/* oklch */ color: oklch(35.8% 0.195 271.9);

Tailwind

colors: {
  custom: {
    50: '#755ebd',
    500: '#231fa0',
    950: '#000000',
  },
}

SCSS

$custom: #231fa0;
$custom-light: #755ebd;
$custom-dark: #000000;

JSON

{
  "hex": "#231fa0",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 160
  },
  "hsl": {
    "h": 241.86,
    "s": 67.539,
    "l": 37.451
  },
  "oklch": {
    "l": 0.3582,
    "c": 0.19541,
    "h": 271.9
  },
  "luminance": 0.03875
}

Semantic roles & 50–950 ramp

primary

#231FA0

secondary

#C0C358

accent

#EA3DE5

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231FA0

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

Preview Lab → · Contrast checker → · Palette generator →