#373F8A#373F8A

#373F8A is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.4% C 0.124 H 274.8°. Best body text is #FFFFFF at 9.37:1 contrast (WCAG AA passes).

Color values

HEX	#373F8A
RGB	rgb(55, 63, 138)
HSL	hsl(234, 43%, 38%)
HSV	hsv(234, 60%, 54%)
CMYK	cmyk(60.1%, 54.3%, 0%, 45.9%)
CIE-LAB	lab(29.92, 20.65, -43.01)
CIE-LCH	lch(29.92, 47.71, 295.65°)
OKLab	oklab(40.38% 0.0104 -0.1232)
OKLCH	oklch(40.38% 0.124 274.8)
XYZ	xyz(7.9390, 6.2016, 24.8185)
Luminance	0.0620 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373F8A #8A8237

analogous

#37688A #373F8A #58378A

triadic

#373F8A #8A373F #3F8A37

tetradic

#373F8A #8A3768 #8A8237 #378A58

square

#373F8A #8A3768 #8A8237 #378A58

split-complementary

#373F8A #8A5837 #688A37

monochromatic

#141732 #262B5E #373F8A #4853B6 #747CC8

Accessibility & contrast

On white

9.37

#373F8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#373F8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373F8A

9.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373F8A	#FFFFFF	#000000	##FFFFFF
##373F8A	1.00	9.37	2.24	9.37
#FFFFFF	9.37	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#124A8D

Deuteranopia (green-blind)

#004388

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #373f8a;
/* rgb */ color: rgb(55, 63, 138);
/* oklch */ color: oklch(40.4% 0.124 274.8);

Tailwind

colors: {
  custom: {
    50: '#7673ad',
    500: '#373f8a',
    950: '#000000',
  },
}

SCSS

$custom: #373f8a;
$custom-light: #7673ad;
$custom-dark: #000000;

JSON

{
  "hex": "#373f8a",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 138
  },
  "hsl": {
    "h": 234.217,
    "s": 43.005,
    "l": 37.843
  },
  "oklch": {
    "l": 0.40384,
    "c": 0.12361,
    "h": 274.8
  },
  "luminance": 0.06202
}

Semantic roles & 50–950 ramp

primary

#373F8A

secondary

#B0AA6D

accent

#C755D3

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #373F8A

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

Preview Lab → · Contrast checker → · Palette generator →