#231B63#231B63

#231B63 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.5% C 0.121 H 280.5°. Best body text is #FFFFFF at 14.91:1 contrast (WCAG AA passes).

Color values

HEX	#231B63
RGB	rgb(35, 27, 99)
HSL	hsl(247, 57%, 25%)
HSV	hsv(247, 73%, 39%)
CMYK	cmyk(64.6%, 72.7%, 0%, 61.2%)
CIE-LAB	lab(15.71, 27.05, -41.28)
CIE-LCH	lch(15.71, 49.36, 303.24°)
OKLab	oklab(28.49% 0.022 -0.1189)
OKLCH	oklch(28.49% 0.121 280.5)
XYZ	xyz(3.3365, 2.0418, 12.0202)
Luminance	0.0204 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B63 #5B631B

analogous

#1B3763 #231B63 #471B63

triadic

#231B63 #63231B #1B6323

tetradic

#231B63 #631B37 #5B631B #1B6347

square

#231B63 #631B37 #5B631B #1B6347

split-complementary

#231B63 #63471B #37631B

monochromatic

#090718 #120E33 #231B63 #342893 #4535C3

Accessibility & contrast

On white

14.91

#231B63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.41

#231B63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B63

14.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B63	#FFFFFF	#000000	##FFFFFF
##231B63	1.00	14.91	1.41	14.91
#FFFFFF	14.91	1.00	21.00	1.00
#000000	1.41	21.00	1.00	21.00
##FFFFFF	14.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A65

Deuteranopia (green-blind)

#002462

Tritanopia (blue-blind)

#002E3C

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #231b63;
/* rgb */ color: rgb(35, 27, 99);
/* oklch */ color: oklch(28.5% 0.121 280.5);

Tailwind

colors: {
  custom: {
    50: '#675890',
    500: '#231b63',
    950: '#000000',
  },
}

SCSS

$custom: #231b63;
$custom-light: #675890;
$custom-dark: #000000;

JSON

{
  "hex": "#231b63",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 99
  },
  "hsl": {
    "h": 246.667,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.28486,
    "c": 0.12096,
    "h": 280.5
  },
  "luminance": 0.02042
}

Semantic roles & 50–950 ramp

primary

#231B63

secondary

#8F9841

accent

#E047CF

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06030D

muted

#7A787D

Preview Lab

Preview with #231B63

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

Preview Lab → · Contrast checker → · Palette generator →