#373A8A#373A8A

#373A8A is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.4% C 0.131 H 277.0°. Best body text is #FFFFFF at 9.84:1 contrast (WCAG AA passes).

Color values

HEX	#373A8A
RGB	rgb(55, 58, 138)
HSL	hsl(238, 43%, 38%)
HSV	hsv(238, 60%, 54%)
CMYK	cmyk(60.1%, 58%, 0%, 45.9%)
CIE-LAB	lab(28.57, 23.99, -45.18)
CIE-LCH	lch(28.57, 51.15, 297.97°)
OKLab	oklab(39.38% 0.0158 -0.1296)
OKLCH	oklch(39.38% 0.131 277)
XYZ	xyz(7.6746, 5.6728, 24.7304)
Luminance	0.0567 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373A8A #8A8737

analogous

#37648A #373A8A #5D378A

triadic

#373A8A #8A373A #3A8A37

tetradic

#373A8A #8A3764 #8A8737 #378A5D

square

#373A8A #8A3764 #8A8737 #378A5D

split-complementary

#373A8A #8A5D37 #648A37

monochromatic

#141532 #26285E #373A8A #484CB6 #7477C8

Accessibility & contrast

On white

9.84

#373A8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#373A8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373A8A

9.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373A8A	#FFFFFF	#000000	##FFFFFF
##373A8A	1.00	9.84	2.13	9.84
#FFFFFF	9.84	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478D

Deuteranopia (green-blind)

#004088

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #373a8a;
/* rgb */ color: rgb(55, 58, 138);
/* oklch */ color: oklch(39.4% 0.131 277.0);

Tailwind

colors: {
  custom: {
    50: '#7670ad',
    500: '#373a8a',
    950: '#000000',
  },
}

SCSS

$custom: #373a8a;
$custom-light: #7670ad;
$custom-dark: #000000;

JSON

{
  "hex": "#373a8a",
  "rgb": {
    "r": 55,
    "g": 58,
    "b": 138
  },
  "hsl": {
    "h": 237.831,
    "s": 43.005,
    "l": 37.843
  },
  "oklch": {
    "l": 0.39379,
    "c": 0.13058,
    "h": 277
  },
  "luminance": 0.05673
}

Semantic roles & 50–950 ramp

primary

#373A8A

secondary

#B0AE6D

accent

#CE55D3

background

#F7F6FA

surface

#EEECF4

border

#C9C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #373A8A

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

Preview Lab → · Contrast checker → · Palette generator →