#373B9F#373B9F

#373B9F is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.3% C 0.159 H 275.2°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#373B9F
RGB	rgb(55, 59, 159)
HSL	hsl(238, 49%, 42%)
HSV	hsv(238, 65%, 62%)
CMYK	cmyk(65.4%, 62.9%, 0%, 37.6%)
CIE-LAB	lab(30.50, 30.74, -54.90)
CIE-LCH	lch(30.50, 62.92, 299.25°)
OKLab	oklab(41.33% 0.0145 -0.1582)
OKLCH	oklch(41.33% 0.159 275.2)
XYZ	xyz(9.3955, 6.4426, 33.5426)
Luminance	0.0644 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373B9F #9F9B37

analogous

#376F9F #373B9F #67379F

triadic

#373B9F #9F373B #3B9F37

tetradic

#373B9F #9F376F #9F9B37 #379F67

square

#373B9F #9F376F #9F9B37 #379F67

split-complementary

#373B9F #9F6737 #6F9F37

monochromatic

#181944 #272A72 #373B9F #5155C3 #7E81D2

Accessibility & contrast

On white

9.18

#373B9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#373B9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373B9F

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373B9F	#FFFFFF	#000000	##FFFFFF
##373B9F	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA2

Deuteranopia (green-blind)

#00439D

Tritanopia (blue-blind)

#005467

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #373b9f;
/* rgb */ color: rgb(55, 59, 159);
/* oklch */ color: oklch(41.3% 0.159 275.2);

Tailwind

colors: {
  custom: {
    50: '#7a71bc',
    500: '#373b9f',
    950: '#000000',
  },
}

SCSS

$custom: #373b9f;
$custom-light: #7a71bc;
$custom-dark: #000000;

JSON

{
  "hex": "#373b9f",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 159
  },
  "hsl": {
    "h": 237.692,
    "s": 48.598,
    "l": 41.961
  },
  "oklch": {
    "l": 0.41334,
    "c": 0.15884,
    "h": 275.2
  },
  "luminance": 0.06443
}

Semantic roles & 50–950 ramp

primary

#373B9F

secondary

#BCB976

accent

#D350D8

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #373B9F

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

Preview Lab → · Contrast checker → · Palette generator →