#37439B#37439B

#37439B is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.5% C 0.143 H 272.9°. Best body text is #FFFFFF at 8.61:1 contrast (WCAG AA passes).

Color values

HEX	#37439B
RGB	rgb(55, 67, 155)
HSL	hsl(233, 48%, 41%)
HSV	hsv(233, 65%, 61%)
CMYK	cmyk(64.5%, 56.8%, 0%, 39.2%)
CIE-LAB	lab(32.24, 24.08, -49.65)
CIE-LCH	lch(32.24, 55.18, 295.88°)
OKLab	oklab(42.52% 0.0072 -0.1427)
OKLCH	oklch(42.52% 0.143 272.9)
XYZ	xyz(9.4971, 7.1923, 31.8918)
Luminance	0.0719 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37439B #9B8F37

analogous

#37759B #37439B #5D379B

triadic

#37439B #9B3743 #439B37

tetradic

#37439B #9B3775 #9B8F37 #379B5D

square

#37439B #9B3775 #9B8F37 #379B5D

split-complementary

#37439B #9B5D37 #759B37

monochromatic

#171C41 #272F6E #37439B #4F5CC0 #7C86D0

Accessibility & contrast

On white

8.61

#37439B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#37439B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37439B

8.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37439B	#FFFFFF	#000000	##FFFFFF
##37439B	1.00	8.61	2.44	8.61
#FFFFFF	8.61	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00509E

Deuteranopia (green-blind)

#004899

Tritanopia (blue-blind)

#005868

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #37439b;
/* rgb */ color: rgb(55, 67, 155);
/* oklch */ color: oklch(42.5% 0.143 272.9);

Tailwind

colors: {
  custom: {
    50: '#7977b9',
    500: '#37439b',
    950: '#000000',
  },
}

SCSS

$custom: #37439b;
$custom-light: #7977b9;
$custom-dark: #000000;

JSON

{
  "hex": "#37439b",
  "rgb": {
    "r": 55,
    "g": 67,
    "b": 155
  },
  "hsl": {
    "h": 232.8,
    "s": 47.619,
    "l": 41.176
  },
  "oklch": {
    "l": 0.42523,
    "c": 0.14285,
    "h": 272.9
  },
  "luminance": 0.07193
}

Semantic roles & 50–950 ramp

primary

#37439B

secondary

#BAB174

accent

#C751D7

background

#F7F7FB

surface

#EEEDF6

border

#C9C8D0

text

#0A0811

muted

#7C7B80

Preview Lab

Preview with #37439B

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

Preview Lab → · Contrast checker → · Palette generator →