#231B84#231B84

#231B84 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.1% C 0.165 H 275.2°. Best body text is #FFFFFF at 13.45:1 contrast (WCAG AA passes).

Color values

HEX	#231B84
RGB	rgb(35, 27, 132)
HSL	hsl(245, 66%, 31%)
HSV	hsv(245, 80%, 52%)
CMYK	cmyk(73.5%, 79.5%, 0%, 48.2%)
CIE-LAB	lab(19.25, 38.45, -56.74)
CIE-LCH	lch(19.25, 68.54, 304.13°)
OKLab	oklab(32.07% 0.0148 -0.1641)
OKLCH	oklch(32.07% 0.165 275.2)
XYZ	xyz(5.2486, 2.8066, 22.0905)
Luminance	0.0281 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B84 #7C841B

analogous

#1B4784 #231B84 #571B84

triadic

#231B84 #84231B #1B8423

tetradic

#231B84 #841B47 #7C841B #1B8457

square

#231B84 #841B47 #7C841B #1B8457

split-complementary

#231B84 #84571B #47841B

monochromatic

#08061E #161151 #231B84 #3025B7 #4D41D8

Accessibility & contrast

On white

13.45

#231B84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#231B84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B84

13.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B84	#FFFFFF	#000000	##FFFFFF
##231B84	1.00	13.45	1.56	13.45
#FFFFFF	13.45	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003387

Deuteranopia (green-blind)

#002A82

Tritanopia (blue-blind)

#003A4F

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #231b84;
/* rgb */ color: rgb(35, 27, 132);
/* oklch */ color: oklch(32.1% 0.165 275.2);

Tailwind

colors: {
  custom: {
    50: '#6f5aa9',
    500: '#231b84',
    950: '#000000',
  },
}

SCSS

$custom: #231b84;
$custom-light: #6f5aa9;
$custom-dark: #000000;

JSON

{
  "hex": "#231b84",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 132
  },
  "hsl": {
    "h": 244.571,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.32068,
    "c": 0.16474,
    "h": 275.2
  },
  "luminance": 0.02807
}

Semantic roles & 50–950 ramp

primary

#231B84

secondary

#AFB743

accent

#E93FDC

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #231B84

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

Preview Lab → · Contrast checker → · Palette generator →