#231B72#231B72

#231B72 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.1% C 0.141 H 277.7°. Best body text is #FFFFFF at 14.27:1 contrast (WCAG AA passes).

Color values

HEX	#231B72
RGB	rgb(35, 27, 114)
HSL	hsl(246, 62%, 28%)
HSV	hsv(246, 76%, 45%)
CMYK	cmyk(69.3%, 76.3%, 0%, 55.3%)
CIE-LAB	lab(17.25, 32.33, -48.54)
CIE-LCH	lch(17.25, 58.32, 303.66°)
OKLab	oklab(30.06% 0.019 -0.1402)
OKLCH	oklch(30.06% 0.141 277.7)
XYZ	xyz(4.1213, 2.3557, 16.1538)
Luminance	0.0236 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B72 #6A721B

analogous

#1B3F72 #231B72 #4E1B72

triadic

#231B72 #72231B #1B7223

tetradic

#231B72 #721B3F #6A721B #1B724E

square

#231B72 #721B3F #6A721B #1B724E

split-complementary

#231B72 #724E1B #3F721B

monochromatic

#080619 #140F41 #231B72 #3227A3 #4638D0

Accessibility & contrast

On white

14.27

#231B72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#231B72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B72

14.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B72	#FFFFFF	#000000	##FFFFFF
##231B72	1.00	14.27	1.47	14.27
#FFFFFF	14.27	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E75

Deuteranopia (green-blind)

#002770

Tritanopia (blue-blind)

#003445

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #231b72;
/* rgb */ color: rgb(35, 27, 114);
/* oklch */ color: oklch(30.1% 0.141 277.7);

Tailwind

colors: {
  custom: {
    50: '#6a599b',
    500: '#231b72',
    950: '#000000',
  },
}

SCSS

$custom: #231b72;
$custom-light: #6a599b;
$custom-dark: #000000;

JSON

{
  "hex": "#231b72",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 114
  },
  "hsl": {
    "h": 245.517,
    "s": 61.702,
    "l": 27.647
  },
  "oklch": {
    "l": 0.30062,
    "c": 0.14149,
    "h": 277.7
  },
  "luminance": 0.02356
}

Semantic roles & 50–950 ramp

primary

#231B72

secondary

#9DA742

accent

#E543D6

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #231B72

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

Preview Lab → · Contrast checker → · Palette generator →