#373D8A#373D8A

#373D8A is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.0% C 0.126 H 275.7°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#373D8A
RGB	rgb(55, 61, 138)
HSL	hsl(236, 43%, 38%)
HSV	hsv(236, 60%, 54%)
CMYK	cmyk(60.1%, 55.8%, 0%, 45.9%)
CIE-LAB	lab(29.37, 21.99, -43.88)
CIE-LCH	lch(29.37, 49.09, 296.62°)
OKLab	oklab(39.98% 0.0126 -0.1258)
OKLCH	oklch(39.98% 0.126 275.7)
XYZ	xyz(7.8303, 5.9841, 24.7823)
Luminance	0.0599 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373D8A #8A8437

analogous

#37668A #373D8A #5B378A

triadic

#373D8A #8A373D #3D8A37

tetradic

#373D8A #8A3766 #8A8437 #378A5B

square

#373D8A #8A3766 #8A8437 #378A5B

split-complementary

#373D8A #8A5B37 #668A37

monochromatic

#141632 #262A5E #373D8A #4850B6 #747AC8

Accessibility & contrast

On white

9.56

#373D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#373D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373D8A

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373D8A	#FFFFFF	#000000	##FFFFFF
##373D8A	1.00	9.56	2.20	9.56
#FFFFFF	9.56	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#09498D

Deuteranopia (green-blind)

#004288

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #373d8a;
/* rgb */ color: rgb(55, 61, 138);
/* oklch */ color: oklch(40.0% 0.126 275.7);

Tailwind

colors: {
  custom: {
    50: '#7672ad',
    500: '#373d8a',
    950: '#000000',
  },
}

SCSS

$custom: #373d8a;
$custom-light: #7672ad;
$custom-dark: #000000;

JSON

{
  "hex": "#373d8a",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 138
  },
  "hsl": {
    "h": 235.663,
    "s": 43.005,
    "l": 37.843
  },
  "oklch": {
    "l": 0.39977,
    "c": 0.1264,
    "h": 275.7
  },
  "luminance": 0.05985
}

Semantic roles & 50–950 ramp

primary

#373D8A

secondary

#B0AB6D

accent

#CA55D3

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #373D8A

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

Preview Lab → · Contrast checker → · Palette generator →