#231F73#231F73

#231F73 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.8% C 0.138 H 276.6°. Best body text is #FFFFFF at 13.86:1 contrast (WCAG AA passes).

Color values

HEX	#231F73
RGB	rgb(35, 31, 115)
HSL	hsl(243, 58%, 29%)
HSV	hsv(243, 73%, 45%)
CMYK	cmyk(69.6%, 73%, 0%, 54.9%)
CIE-LAB	lab(18.25, 30.19, -47.54)
CIE-LCH	lch(18.25, 56.32, 302.42°)
OKLab	oklab(30.81% 0.016 -0.1373)
OKLCH	oklch(30.81% 0.138 276.6)
XYZ	xyz(4.2766, 2.5747, 16.4879)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231F73 #6F731F

analogous

#1F4573 #231F73 #4D1F73

triadic

#231F73 #73231F #1F7323

tetradic

#231F73 #731F45 #6F731F #1F734D

square

#231F73 #731F45 #6F731F #1F734D

split-complementary

#231F73 #734D1F #45731F

monochromatic

#070618 #141243 #231F73 #322CA3 #4741CC

Accessibility & contrast

On white

13.86

#231F73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#231F73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231F73

13.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231F73	#FFFFFF	#000000	##FFFFFF
##231F73	1.00	13.86	1.52	13.86
#FFFFFF	13.86	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003076

Deuteranopia (green-blind)

#002971

Tritanopia (blue-blind)

#003646

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #231f73;
/* rgb */ color: rgb(35, 31, 115);
/* oklch */ color: oklch(30.8% 0.138 276.6);

Tailwind

colors: {
  custom: {
    50: '#6a5b9c',
    500: '#231f73',
    950: '#000000',
  },
}

SCSS

$custom: #231f73;
$custom-light: #6a5b9c;
$custom-dark: #000000;

JSON

{
  "hex": "#231f73",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 115
  },
  "hsl": {
    "h": 242.857,
    "s": 57.534,
    "l": 28.627
  },
  "oklch": {
    "l": 0.30807,
    "c": 0.13822,
    "h": 276.6
  },
  "luminance": 0.02575
}

Semantic roles & 50–950 ramp

primary

#231F73

secondary

#A2A747

accent

#E147D9

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #231F73

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

Preview Lab → · Contrast checker → · Palette generator →