#373B8A#373B8A

#373B8A is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.6% C 0.129 H 276.6°. Best body text is #FFFFFF at 9.74:1 contrast (WCAG AA passes).

Color values

HEX	#373B8A
RGB	rgb(55, 59, 138)
HSL	hsl(237, 43%, 38%)
HSV	hsv(237, 60%, 54%)
CMYK	cmyk(60.1%, 57.2%, 0%, 45.9%)
CIE-LAB	lab(28.84, 23.33, -44.75)
CIE-LCH	lch(28.84, 50.46, 297.53°)
OKLab	oklab(39.58% 0.0148 -0.1283)
OKLCH	oklch(39.58% 0.129 276.6)
XYZ	xyz(7.7255, 5.7746, 24.7473)
Luminance	0.0578 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373B8A #8A8637

analogous

#37658A #373B8A #5C378A

triadic

#373B8A #8A373B #3B8A37

tetradic

#373B8A #8A3765 #8A8637 #378A5C

square

#373B8A #8A3765 #8A8637 #378A5C

split-complementary

#373B8A #8A5C37 #658A37

monochromatic

#141632 #26285E #373B8A #484EB6 #7478C8

Accessibility & contrast

On white

9.74

#373B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#373B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373B8A

9.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373B8A	#FFFFFF	#000000	##FFFFFF
##373B8A	1.00	9.74	2.16	9.74
#FFFFFF	9.74	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488D

Deuteranopia (green-blind)

#004188

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #373b8a;
/* rgb */ color: rgb(55, 59, 138);
/* oklch */ color: oklch(39.6% 0.129 276.6);

Tailwind

colors: {
  custom: {
    50: '#7671ad',
    500: '#373b8a',
    950: '#000000',
  },
}

SCSS

$custom: #373b8a;
$custom-light: #7671ad;
$custom-dark: #000000;

JSON

{
  "hex": "#373b8a",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 138
  },
  "hsl": {
    "h": 237.108,
    "s": 43.005,
    "l": 37.843
  },
  "oklch": {
    "l": 0.39577,
    "c": 0.12919,
    "h": 276.6
  },
  "luminance": 0.05775
}

Semantic roles & 50–950 ramp

primary

#373B8A

secondary

#B0AD6D

accent

#CD55D3

background

#F7F6FA

surface

#EEECF4

border

#C9C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #373B8A

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

Preview Lab → · Contrast checker → · Palette generator →