#373C8A#373C8A

#373C8A is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.8% C 0.128 H 276.1°. Best body text is #FFFFFF at 9.65:1 contrast (WCAG AA passes).

Color values

HEX	#373C8A
RGB	rgb(55, 60, 138)
HSL	hsl(236, 43%, 38%)
HSV	hsv(236, 60%, 54%)
CMYK	cmyk(60.1%, 56.5%, 0%, 45.9%)
CIE-LAB	lab(29.10, 22.66, -44.32)
CIE-LCH	lch(29.10, 49.78, 297.08°)
OKLab	oklab(39.78% 0.0137 -0.1271)
OKLCH	oklch(39.78% 0.128 276.1)
XYZ	xyz(7.7774, 5.8783, 24.7646)
Luminance	0.0588 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373C8A #8A8537

analogous

#37658A #373C8A #5C378A

triadic

#373C8A #8A373C #3C8A37

tetradic

#373C8A #8A3765 #8A8537 #378A5C

square

#373C8A #8A3765 #8A8537 #378A5C

split-complementary

#373C8A #8A5C37 #658A37

monochromatic

#141632 #26295E #373C8A #484FB6 #7479C8

Accessibility & contrast

On white

9.65

#373C8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#373C8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373C8A

9.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373C8A	#FFFFFF	#000000	##FFFFFF
##373C8A	1.00	9.65	2.18	9.65
#FFFFFF	9.65	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04488D

Deuteranopia (green-blind)

#004188

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #373c8a;
/* rgb */ color: rgb(55, 60, 138);
/* oklch */ color: oklch(39.8% 0.128 276.1);

Tailwind

colors: {
  custom: {
    50: '#7671ad',
    500: '#373c8a',
    950: '#000000',
  },
}

SCSS

$custom: #373c8a;
$custom-light: #7671ad;
$custom-dark: #000000;

JSON

{
  "hex": "#373c8a",
  "rgb": {
    "r": 55,
    "g": 60,
    "b": 138
  },
  "hsl": {
    "h": 236.386,
    "s": 43.005,
    "l": 37.843
  },
  "oklch": {
    "l": 0.39776,
    "c": 0.1278,
    "h": 276.1
  },
  "luminance": 0.05879
}

Semantic roles & 50–950 ramp

primary

#373C8A

secondary

#B0AC6D

accent

#CB55D3

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #373C8A

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

Preview Lab → · Contrast checker → · Palette generator →