#231F75#231F75

#231F75 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.0% C 0.141 H 276.4°. Best body text is #FFFFFF at 13.78:1 contrast (WCAG AA passes).

Color values

HEX	#231F75
RGB	rgb(35, 31, 117)
HSL	hsl(243, 58%, 29%)
HSV	hsv(243, 74%, 46%)
CMYK	cmyk(70.1%, 73.5%, 0%, 54.1%)
CIE-LAB	lab(18.46, 30.91, -48.50)
CIE-LCH	lch(18.46, 57.51, 302.51°)
OKLab	oklab(31.02% 0.0157 -0.1401)
OKLCH	oklch(31.02% 0.141 276.4)
XYZ	xyz(4.3930, 2.6213, 17.1006)
Luminance	0.0262 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231F75 #71751F

analogous

#1F4675 #231F75 #4E1F75

triadic

#231F75 #75231F #1F7523

tetradic

#231F75 #751F46 #71751F #1F754E

square

#231F75 #751F46 #71751F #1F754E

split-complementary

#231F75 #754E1F #46751F

monochromatic

#070618 #151245 #231F75 #312CA5 #4842CD

Accessibility & contrast

On white

13.78

#231F75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#231F75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231F75

13.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231F75	#FFFFFF	#000000	##FFFFFF
##231F75	1.00	13.78	1.52	13.78
#FFFFFF	13.78	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003178

Deuteranopia (green-blind)

#002973

Tritanopia (blue-blind)

#003747

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #231f75;
/* rgb */ color: rgb(35, 31, 117);
/* oklch */ color: oklch(31.0% 0.141 276.4);

Tailwind

colors: {
  custom: {
    50: '#6a5b9e',
    500: '#231f75',
    950: '#000000',
  },
}

SCSS

$custom: #231f75;
$custom-light: #6a5b9e;
$custom-dark: #000000;

JSON

{
  "hex": "#231f75",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 117
  },
  "hsl": {
    "h": 242.791,
    "s": 58.108,
    "l": 29.02
  },
  "oklch": {
    "l": 0.31017,
    "c": 0.14094,
    "h": 276.4
  },
  "luminance": 0.02622
}

Semantic roles & 50–950 ramp

primary

#231F75

secondary

#A4A947

accent

#E146DA

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #231F75

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

Preview Lab → · Contrast checker → · Palette generator →