#231B68#231B68

#231B68 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 29.0% C 0.128 H 279.5°. Best body text is #FFFFFF at 14.70:1 contrast (WCAG AA passes).

Color values

HEX	#231B68
RGB	rgb(35, 27, 104)
HSL	hsl(246, 59%, 26%)
HSV	hsv(246, 74%, 41%)
CMYK	cmyk(66.3%, 74%, 0%, 59.2%)
CIE-LAB	lab(16.21, 28.83, -43.75)
CIE-LCH	lch(16.21, 52.39, 303.38°)
OKLab	oklab(29% 0.0211 -0.1262)
OKLCH	oklch(29% 0.128 279.5)
XYZ	xyz(3.5830, 2.1404, 13.3183)
Luminance	0.0214 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B68 #60681B

analogous

#1B3968 #231B68 #491B68

triadic

#231B68 #68231B #1B6823

tetradic

#231B68 #681B39 #60681B #1B6849

square

#231B68 #681B39 #60681B #1B6849

split-complementary

#231B68 #68491B #39681B

monochromatic

#080618 #130E37 #231B68 #332899 #4434C9

Accessibility & contrast

On white

14.70

#231B68 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#231B68 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B68

14.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B68	#FFFFFF	#000000	##FFFFFF
##231B68	1.00	14.70	1.43	14.70
#FFFFFF	14.70	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B6A

Deuteranopia (green-blind)

#002567

Tritanopia (blue-blind)

#00303F

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #231b68;
/* rgb */ color: rgb(35, 27, 104);
/* oklch */ color: oklch(29.0% 0.128 279.5);

Tailwind

colors: {
  custom: {
    50: '#685894',
    500: '#231b68',
    950: '#000000',
  },
}

SCSS

$custom: #231b68;
$custom-light: #685894;
$custom-dark: #000000;

JSON

{
  "hex": "#231b68",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 104
  },
  "hsl": {
    "h": 246.234,
    "s": 58.779,
    "l": 25.686
  },
  "oklch": {
    "l": 0.29,
    "c": 0.12794,
    "h": 279.5
  },
  "luminance": 0.02141
}

Semantic roles & 50–950 ramp

primary

#231B68

secondary

#949D42

accent

#E246D2

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#07030D

muted

#7A787E

Preview Lab

Preview with #231B68

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

Preview Lab → · Contrast checker → · Palette generator →