#231B66#231B66

#231B66 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 28.8% C 0.125 H 279.9°. Best body text is #FFFFFF at 14.79:1 contrast (WCAG AA passes).

Color values

HEX	#231B66
RGB	rgb(35, 27, 102)
HSL	hsl(246, 58%, 25%)
HSV	hsv(246, 74%, 40%)
CMYK	cmyk(65.7%, 73.5%, 0%, 60%)
CIE-LAB	lab(16.00, 28.12, -42.77)
CIE-LCH	lch(16.00, 51.18, 303.32°)
OKLab	oklab(28.79% 0.0215 -0.1233)
OKLCH	oklch(28.79% 0.125 279.9)
XYZ	xyz(3.4826, 2.1002, 12.7897)
Luminance	0.0210 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B66 #5E661B

analogous

#1B3866 #231B66 #481B66

triadic

#231B66 #66231B #1B6623

tetradic

#231B66 #661B38 #5E661B #1B6648

square

#231B66 #661B38 #5E661B #1B6648

split-complementary

#231B66 #66481B #38661B

monochromatic

#080618 #120E36 #231B66 #342896 #4435C7

Accessibility & contrast

On white

14.79

#231B66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.42

#231B66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B66

14.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B66	#FFFFFF	#000000	##FFFFFF
##231B66	1.00	14.79	1.42	14.79
#FFFFFF	14.79	1.00	21.00	1.00
#000000	1.42	21.00	1.00	21.00
##FFFFFF	14.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B68

Deuteranopia (green-blind)

#002565

Tritanopia (blue-blind)

#002F3E

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #231b66;
/* rgb */ color: rgb(35, 27, 102);
/* oklch */ color: oklch(28.8% 0.125 279.9);

Tailwind

colors: {
  custom: {
    50: '#675892',
    500: '#231b66',
    950: '#000000',
  },
}

SCSS

$custom: #231b66;
$custom-light: #675892;
$custom-dark: #000000;

JSON

{
  "hex": "#231b66",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 102
  },
  "hsl": {
    "h": 246.4,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.28792,
    "c": 0.12516,
    "h": 279.9
  },
  "luminance": 0.02101
}

Semantic roles & 50–950 ramp

primary

#231B66

secondary

#929B41

accent

#E146D1

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#07030D

muted

#7A787E

Preview Lab

Preview with #231B66

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

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