#231B77#231B77

#231B77 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.6% C 0.148 H 276.9°. Best body text is #FFFFFF at 14.05:1 contrast (WCAG AA passes).

Color values

HEX	#231B77
RGB	rgb(35, 27, 119)
HSL	hsl(245, 63%, 29%)
HSV	hsv(245, 77%, 47%)
CMYK	cmyk(70.6%, 77.3%, 0%, 53.3%)
CIE-LAB	lab(17.79, 34.05, -50.87)
CIE-LCH	lch(17.79, 61.22, 303.80°)
OKLab	oklab(30.61% 0.0179 -0.147)
OKLCH	oklch(30.61% 0.148 276.9)
XYZ	xyz(4.4138, 2.4727, 17.6939)
Luminance	0.0247 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B77 #6F771B

analogous

#1B4177 #231B77 #511B77

triadic

#231B77 #77231B #1B7723

tetradic

#231B77 #771B41 #6F771B #1B7751

square

#231B77 #771B41 #6F771B #1B7751

split-complementary

#231B77 #77511B #41771B

monochromatic

#070619 #141045 #231B77 #3226A9 #473AD2

Accessibility & contrast

On white

14.05

#231B77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#231B77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B77

14.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B77	#FFFFFF	#000000	##FFFFFF
##231B77	1.00	14.05	1.49	14.05
#FFFFFF	14.05	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7A

Deuteranopia (green-blind)

#002875

Tritanopia (blue-blind)

#003547

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #231b77;
/* rgb */ color: rgb(35, 27, 119);
/* oklch */ color: oklch(30.6% 0.148 276.9);

Tailwind

colors: {
  custom: {
    50: '#6b599f',
    500: '#231b77',
    950: '#000000',
  },
}

SCSS

$custom: #231b77;
$custom-light: #6b599f;
$custom-dark: #000000;

JSON

{
  "hex": "#231b77",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 119
  },
  "hsl": {
    "h": 245.217,
    "s": 63.014,
    "l": 28.627
  },
  "oklch": {
    "l": 0.30608,
    "c": 0.14808,
    "h": 276.9
  },
  "luminance": 0.02473
}

Semantic roles & 50–950 ramp

primary

#231B77

secondary

#A2AB42

accent

#E642D8

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#08030F

muted

#7A787E

Preview Lab

Preview with #231B77

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

Preview Lab → · Contrast checker → · Palette generator →