#231B74#231B74

#231B74 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.3% C 0.144 H 277.4°. Best body text is #FFFFFF at 14.19:1 contrast (WCAG AA passes).

Color values

HEX	#231B74
RGB	rgb(35, 27, 116)
HSL	hsl(245, 62%, 28%)
HSV	hsv(245, 77%, 45%)
CMYK	cmyk(69.8%, 76.7%, 0%, 54.5%)
CIE-LAB	lab(17.47, 33.02, -49.48)
CIE-LCH	lch(17.47, 59.49, 303.71°)
OKLab	oklab(30.28% 0.0186 -0.1429)
OKLCH	oklch(30.28% 0.144 277.4)
XYZ	xyz(4.2364, 2.4018, 16.7599)
Luminance	0.0240 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B74 #6C741B

analogous

#1B3F74 #231B74 #4F1B74

triadic

#231B74 #74231B #1B7423

tetradic

#231B74 #741B3F #6C741B #1B744F

square

#231B74 #741B3F #6C741B #1B744F

split-complementary

#231B74 #744F1B #3F741B

monochromatic

#070619 #140F42 #231B74 #3227A6 #4639D1

Accessibility & contrast

On white

14.19

#231B74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#231B74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B74

14.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B74	#FFFFFF	#000000	##FFFFFF
##231B74	1.00	14.19	1.48	14.19
#FFFFFF	14.19	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E77

Deuteranopia (green-blind)

#002772

Tritanopia (blue-blind)

#003446

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #231b74;
/* rgb */ color: rgb(35, 27, 116);
/* oklch */ color: oklch(30.3% 0.144 277.4);

Tailwind

colors: {
  custom: {
    50: '#6b599d',
    500: '#231b74',
    950: '#000000',
  },
}

SCSS

$custom: #231b74;
$custom-light: #6b599d;
$custom-dark: #000000;

JSON

{
  "hex": "#231b74",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 116
  },
  "hsl": {
    "h": 245.393,
    "s": 62.238,
    "l": 28.039
  },
  "oklch": {
    "l": 0.30279,
    "c": 0.14413,
    "h": 277.4
  },
  "luminance": 0.02402
}

Semantic roles & 50–950 ramp

primary

#231B74

secondary

#9FA942

accent

#E542D7

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #231B74

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

Preview Lab → · Contrast checker → · Palette generator →