#373E8B#373E8B

#373E8B is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.3% C 0.126 H 275.3°. Best body text is #FFFFFF at 9.44:1 contrast (WCAG AA passes).

Color values

HEX	#373E8B
RGB	rgb(55, 62, 139)
HSL	hsl(235, 43%, 38%)
HSV	hsv(235, 60%, 55%)
CMYK	cmyk(60.4%, 55.4%, 0%, 45.5%)
CIE-LAB	lab(29.72, 21.68, -43.95)
CIE-LCH	lch(29.72, 49.00, 296.26°)
OKLab	oklab(40.26% 0.0116 -0.1259)
OKLCH	oklch(40.26% 0.126 275.3)
XYZ	xyz(7.9569, 6.1210, 25.1833)
Luminance	0.0612 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373E8B #8B8437

analogous

#37688B #373E8B #5A378B

triadic

#373E8B #8B373E #3E8B37

tetradic

#373E8B #8B3768 #8B8437 #378B5A

square

#373E8B #8B3768 #8B8437 #378B5A

split-complementary

#373E8B #8B5A37 #688B37

monochromatic

#141733 #262A5F #373E8B #4852B7 #747BC8

Accessibility & contrast

On white

9.44

#373E8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#373E8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373E8B

9.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373E8B	#FFFFFF	#000000	##FFFFFF
##373E8B	1.00	9.44	2.22	9.44
#FFFFFF	9.44	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C4A8E

Deuteranopia (green-blind)

#004389

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #373e8b;
/* rgb */ color: rgb(55, 62, 139);
/* oklch */ color: oklch(40.3% 0.126 275.3);

Tailwind

colors: {
  custom: {
    50: '#7673ad',
    500: '#373e8b',
    950: '#000000',
  },
}

SCSS

$custom: #373e8b;
$custom-light: #7673ad;
$custom-dark: #000000;

JSON

{
  "hex": "#373e8b",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 139
  },
  "hsl": {
    "h": 235,
    "s": 43.299,
    "l": 38.039
  },
  "oklch": {
    "l": 0.40257,
    "c": 0.12648,
    "h": 275.3
  },
  "luminance": 0.06122
}

Semantic roles & 50–950 ramp

primary

#373E8B

secondary

#B1AB6D

accent

#C955D3

background

#F7F6FA

surface

#EEECF4

border

#C9C7CE

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #373E8B

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

Preview Lab → · Contrast checker → · Palette generator →