#231B75#231B75

#231B75 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.4% C 0.145 H 277.3°. Best body text is #FFFFFF at 14.14:1 contrast (WCAG AA passes).

Color values

HEX	#231B75
RGB	rgb(35, 27, 117)
HSL	hsl(245, 63%, 28%)
HSV	hsv(245, 77%, 46%)
CMYK	cmyk(70.1%, 76.9%, 0%, 54.1%)
CIE-LAB	lab(17.58, 33.36, -49.95)
CIE-LCH	lch(17.58, 60.06, 303.74°)
OKLab	oklab(30.39% 0.0184 -0.1443)
OKLCH	oklch(30.39% 0.145 277.3)
XYZ	xyz(4.2949, 2.4252, 17.0679)
Luminance	0.0243 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B75 #6D751B

analogous

#1B4075 #231B75 #501B75

triadic

#231B75 #75231B #1B7523

tetradic

#231B75 #751B40 #6D751B #1B7550

square

#231B75 #751B40 #6D751B #1B7550

split-complementary

#231B75 #75501B #40751B

monochromatic

#070619 #141043 #231B75 #3226A7 #4739D1

Accessibility & contrast

On white

14.14

#231B75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#231B75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B75

14.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B75	#FFFFFF	#000000	##FFFFFF
##231B75	1.00	14.14	1.49	14.14
#FFFFFF	14.14	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F78

Deuteranopia (green-blind)

#002773

Tritanopia (blue-blind)

#003546

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #231b75;
/* rgb */ color: rgb(35, 27, 117);
/* oklch */ color: oklch(30.4% 0.145 277.3);

Tailwind

colors: {
  custom: {
    50: '#6b599e',
    500: '#231b75',
    950: '#000000',
  },
}

SCSS

$custom: #231b75;
$custom-light: #6b599e;
$custom-dark: #000000;

JSON

{
  "hex": "#231b75",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 117
  },
  "hsl": {
    "h": 245.333,
    "s": 62.5,
    "l": 28.235
  },
  "oklch": {
    "l": 0.30389,
    "c": 0.14545,
    "h": 277.3
  },
  "luminance": 0.02426
}

Semantic roles & 50–950 ramp

primary

#231B75

secondary

#A0A942

accent

#E642D7

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #231B75

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

Preview Lab → · Contrast checker → · Palette generator →