#231F78#231F78

#231F78 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.3% C 0.145 H 276.0°. Best body text is #FFFFFF at 13.65:1 contrast (WCAG AA passes).

Color values

HEX	#231F78
RGB	rgb(35, 31, 120)
HSL	hsl(243, 59%, 30%)
HSV	hsv(243, 74%, 47%)
CMYK	cmyk(70.8%, 74.2%, 0%, 52.9%)
CIE-LAB	lab(18.77, 31.97, -49.91)
CIE-LCH	lch(18.77, 59.27, 302.65°)
OKLab	oklab(31.33% 0.0151 -0.1442)
OKLCH	oklch(31.33% 0.145 276)
XYZ	xyz(4.5722, 2.6930, 18.0445)
Luminance	0.0269 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231F78 #74781F

analogous

#1F4778 #231F78 #501F78

triadic

#231F78 #78231F #1F7823

tetradic

#231F78 #781F47 #74781F #1F7850

square

#231F78 #781F47 #74781F #1F7850

split-complementary

#231F78 #78501F #47781F

monochromatic

#070618 #151247 #231F78 #312CA9 #4943CE

Accessibility & contrast

On white

13.65

#231F78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#231F78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231F78

13.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231F78	#FFFFFF	#000000	##FFFFFF
##231F78	1.00	13.65	1.54	13.65
#FFFFFF	13.65	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00327B

Deuteranopia (green-blind)

#002A76

Tritanopia (blue-blind)

#003849

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #231f78;
/* rgb */ color: rgb(35, 31, 120);
/* oklch */ color: oklch(31.3% 0.145 276.0);

Tailwind

colors: {
  custom: {
    50: '#6b5ca0',
    500: '#231f78',
    950: '#000000',
  },
}

SCSS

$custom: #231f78;
$custom-light: #6b5ca0;
$custom-dark: #000000;

JSON

{
  "hex": "#231f78",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 120
  },
  "hsl": {
    "h": 242.697,
    "s": 58.94,
    "l": 29.608
  },
  "oklch": {
    "l": 0.31334,
    "c": 0.14499,
    "h": 276
  },
  "luminance": 0.02693
}

Semantic roles & 50–950 ramp

primary

#231F78

secondary

#A7AB47

accent

#E246DB

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#08040F

muted

#7A797E

Preview Lab

Preview with #231F78

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

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