#373B91#373B91

#373B91 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.1% C 0.139 H 276.1°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#373B91
RGB	rgb(55, 59, 145)
HSL	hsl(237, 45%, 39%)
HSV	hsv(237, 62%, 57%)
CMYK	cmyk(62.1%, 59.3%, 0%, 43.1%)
CIE-LAB	lab(29.37, 25.80, -48.20)
CIE-LCH	lch(29.37, 54.67, 298.16°)
OKLab	oklab(40.14% 0.0149 -0.1385)
OKLCH	oklch(40.14% 0.139 276.1)
XYZ	xyz(8.2487, 5.9838, 27.5029)
Luminance	0.0598 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373B91 #918D37

analogous

#376891 #373B91 #603791

triadic

#373B91 #91373B #3B9137

tetradic

#373B91 #913768 #918D37 #379160

square

#373B91 #913768 #918D37 #379160

split-complementary

#373B91 #916037 #689137

monochromatic

#151738 #262965 #373B91 #4B50BB #777BCB

Accessibility & contrast

On white

9.56

#373B91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#373B91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373B91

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373B91	#FFFFFF	#000000	##FFFFFF
##373B91	1.00	9.56	2.20	9.56
#FFFFFF	9.56	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004994

Deuteranopia (green-blind)

#00418F

Tritanopia (blue-blind)

#005060

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #373b91;
/* rgb */ color: rgb(55, 59, 145);
/* oklch */ color: oklch(40.1% 0.139 276.1);

Tailwind

colors: {
  custom: {
    50: '#7871b2',
    500: '#373b91',
    950: '#000000',
  },
}

SCSS

$custom: #373b91;
$custom-light: #7871b2;
$custom-dark: #000000;

JSON

{
  "hex": "#373b91",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 145
  },
  "hsl": {
    "h": 237.333,
    "s": 45,
    "l": 39.216
  },
  "oklch": {
    "l": 0.40144,
    "c": 0.13928,
    "h": 276.1
  },
  "luminance": 0.05984
}

Semantic roles & 50–950 ramp

primary

#373B91

secondary

#B4B170

accent

#CF53D5

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0711

muted

#7C7A80

Preview Lab

Preview with #373B91

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

Preview Lab → · Contrast checker → · Palette generator →