#373D9F#373D9F

#373D9F is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.7% C 0.156 H 274.7°. Best body text is #FFFFFF at 9.01:1 contrast (WCAG AA passes).

Color values

HEX	#373D9F
RGB	rgb(55, 61, 159)
HSL	hsl(237, 49%, 42%)
HSV	hsv(237, 65%, 62%)
CMYK	cmyk(65.4%, 61.6%, 0%, 37.6%)
CIE-LAB	lab(31.00, 29.45, -54.09)
CIE-LCH	lch(31.00, 61.58, 298.57°)
OKLab	oklab(41.7% 0.0128 -0.1558)
OKLCH	oklch(41.7% 0.156 274.7)
XYZ	xyz(9.5002, 6.6521, 33.5775)
Luminance	0.0665 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373D9F #9F9937

analogous

#37719F #373D9F #65379F

triadic

#373D9F #9F373D #3D9F37

tetradic

#373D9F #9F3771 #9F9937 #379F65

square

#373D9F #9F3771 #9F9937 #379F65

split-complementary

#373D9F #9F6537 #719F37

monochromatic

#181A44 #272C72 #373D9F #5157C3 #7E83D2

Accessibility & contrast

On white

9.01

#373D9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#373D9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373D9F

9.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373D9F	#FFFFFF	#000000	##FFFFFF
##373D9F	1.00	9.01	2.33	9.01
#FFFFFF	9.01	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA2

Deuteranopia (green-blind)

#00449D

Tritanopia (blue-blind)

#005568

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #373d9f;
/* rgb */ color: rgb(55, 61, 159);
/* oklch */ color: oklch(41.7% 0.156 274.7);

Tailwind

colors: {
  custom: {
    50: '#7a72bc',
    500: '#373d9f',
    950: '#000000',
  },
}

SCSS

$custom: #373d9f;
$custom-light: #7a72bc;
$custom-dark: #000000;

JSON

{
  "hex": "#373d9f",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 159
  },
  "hsl": {
    "h": 236.538,
    "s": 48.598,
    "l": 41.961
  },
  "oklch": {
    "l": 0.41701,
    "c": 0.15629,
    "h": 274.7
  },
  "luminance": 0.06653
}

Semantic roles & 50–950 ramp

primary

#373D9F

secondary

#BCB876

accent

#D050D8

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #373D9F

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

Preview Lab → · Contrast checker → · Palette generator →