#231B8F#231B8F

#231B8F is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.3% C 0.178 H 273.9°. Best body text is #FFFFFF at 12.92:1 contrast (WCAG AA passes).

Color values

HEX	#231B8F
RGB	rgb(35, 27, 143)
HSL	hsl(244, 68%, 33%)
HSV	hsv(244, 81%, 56%)
CMYK	cmyk(75.5%, 81.1%, 0%, 43.9%)
CIE-LAB	lab(20.53, 42.07, -61.51)
CIE-LCH	lch(20.53, 74.53, 304.37°)
OKLab	oklab(33.34% 0.0121 -0.1779)
OKLCH	oklch(33.34% 0.178 273.9)
XYZ	xyz(6.0413, 3.1237, 26.2658)
Luminance	0.0312 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B8F #878F1B

analogous

#1B4D8F #231B8F #5D1B8F

triadic

#231B8F #8F231B #1B8F23

tetradic

#231B8F #8F1B4D #878F1B #1B8F5D

square

#231B8F #8F1B4D #878F1B #1B8F5D

split-complementary

#231B8F #8F5D1B #4D8F1B

monochromatic

#0A0828 #16115C #231B8F #3025C2 #5248DC

Accessibility & contrast

On white

12.92

#231B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#231B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B8F

12.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B8F	#FFFFFF	#000000	##FFFFFF
##231B8F	1.00	12.92	1.62	12.92
#FFFFFF	12.92	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003792

Deuteranopia (green-blind)

#002C8D

Tritanopia (blue-blind)

#003F55

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #231b8f;
/* rgb */ color: rgb(35, 27, 143);
/* oklch */ color: oklch(33.3% 0.178 273.9);

Tailwind

colors: {
  custom: {
    50: '#715ab1',
    500: '#231b8f',
    950: '#000000',
  },
}

SCSS

$custom: #231b8f;
$custom-light: #715ab1;
$custom-dark: #000000;

JSON

{
  "hex": "#231b8f",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 143
  },
  "hsl": {
    "h": 244.138,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.33339,
    "c": 0.17835,
    "h": 273.9
  },
  "luminance": 0.03124
}

Semantic roles & 50–950 ramp

primary

#231B8F

secondary

#B6BE48

accent

#EB3DDF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #231B8F

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

Preview Lab → · Contrast checker → · Palette generator →