#231B76#231B76

#231B76 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.5% C 0.147 H 277.1°. Best body text is #FFFFFF at 14.10:1 contrast (WCAG AA passes).

Color values

HEX	#231B76
RGB	rgb(35, 27, 118)
HSL	hsl(245, 63%, 28%)
HSV	hsv(245, 77%, 46%)
CMYK	cmyk(70.3%, 77.1%, 0%, 53.7%)
CIE-LAB	lab(17.69, 33.71, -50.41)
CIE-LCH	lch(17.69, 60.64, 303.77°)
OKLab	oklab(30.5% 0.0181 -0.1456)
OKLCH	oklch(30.5% 0.147 277.1)
XYZ	xyz(4.3540, 2.4488, 17.3792)
Luminance	0.0245 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B76 #6E761B

analogous

#1B4076 #231B76 #501B76

triadic

#231B76 #76231B #1B7623

tetradic

#231B76 #761B40 #6E761B #1B7650

square

#231B76 #761B40 #6E761B #1B7650

split-complementary

#231B76 #76501B #40761B

monochromatic

#070619 #141044 #231B76 #3226A8 #473AD2

Accessibility & contrast

On white

14.10

#231B76 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#231B76 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B76

14.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B76	#FFFFFF	#000000	##FFFFFF
##231B76	1.00	14.10	1.49	14.10
#FFFFFF	14.10	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F79

Deuteranopia (green-blind)

#002774

Tritanopia (blue-blind)

#003547

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #231b76;
/* rgb */ color: rgb(35, 27, 118);
/* oklch */ color: oklch(30.5% 0.147 277.1);

Tailwind

colors: {
  custom: {
    50: '#6b599f',
    500: '#231b76',
    950: '#000000',
  },
}

SCSS

$custom: #231b76;
$custom-light: #6b599f;
$custom-dark: #000000;

JSON

{
  "hex": "#231b76",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 118
  },
  "hsl": {
    "h": 245.275,
    "s": 62.759,
    "l": 28.431
  },
  "oklch": {
    "l": 0.30498,
    "c": 0.14677,
    "h": 277.1
  },
  "luminance": 0.02449
}

Semantic roles & 50–950 ramp

primary

#231B76

secondary

#A1AA42

accent

#E642D7

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#08030F

muted

#7A787E

Preview Lab

Preview with #231B76

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

Preview Lab → · Contrast checker → · Palette generator →