#231BA1#231BA1

#231BA1 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 35.5% C 0.200 H 272.2°. Best body text is #FFFFFF at 12.05:1 contrast (WCAG AA passes).

Color values

HEX	#231BA1
RGB	rgb(35, 27, 161)
HSL	hsl(244, 71%, 37%)
HSV	hsv(244, 83%, 63%)
CMYK	cmyk(78.3%, 83.2%, 0%, 36.9%)
CIE-LAB	lab(22.70, 47.80, -69.00)
CIE-LCH	lch(22.70, 83.94, 304.71°)
OKLab	oklab(35.47% 0.0075 -0.1996)
OKLCH	oklch(35.47% 0.2 272.2)
XYZ	xyz(7.5159, 3.7136, 34.0320)
Luminance	0.0371 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231BA1 #99A11B

analogous

#1B56A1 #231BA1 #661BA1

triadic

#231BA1 #A1231B #1BA123

tetradic

#231BA1 #A11B56 #99A11B #1BA166

square

#231BA1 #A11B56 #99A11B #1BA166

split-complementary

#231BA1 #A1661B #56A11B

monochromatic

#0C0938 #18126D #231BA1 #2E24D5 #5D54E2

Accessibility & contrast

On white

12.05

#231BA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#231BA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231BA1

12.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231BA1	#FFFFFF	#000000	##FFFFFF
##231BA1	1.00	12.05	1.74	12.05
#FFFFFF	12.05	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003CA5

Deuteranopia (green-blind)

#002F9F

Tritanopia (blue-blind)

#004660

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #231ba1;
/* rgb */ color: rgb(35, 27, 161);
/* oklch */ color: oklch(35.5% 0.200 272.2);

Tailwind

colors: {
  custom: {
    50: '#765cbe',
    500: '#231ba1',
    950: '#000000',
  },
}

SCSS

$custom: #231ba1;
$custom-light: #765cbe;
$custom-dark: #000000;

JSON

{
  "hex": "#231ba1",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 161
  },
  "hsl": {
    "h": 243.582,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.35472,
    "c": 0.19979,
    "h": 272.2
  },
  "luminance": 0.03714
}

Semantic roles & 50–950 ramp

primary

#231BA1

secondary

#BEC552

accent

#EE3AE3

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231BA1

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

Preview Lab → · Contrast checker → · Palette generator →