#373B87#373B87

#373B87 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.3% C 0.125 H 276.7°. Best body text is #FFFFFF at 9.82:1 contrast (WCAG AA passes).

Color values

HEX	#373B87
RGB	rgb(55, 59, 135)
HSL	hsl(237, 42%, 37%)
HSV	hsv(237, 59%, 53%)
CMYK	cmyk(59.3%, 56.3%, 0%, 47.1%)
CIE-LAB	lab(28.61, 22.27, -43.25)
CIE-LCH	lch(28.61, 48.65, 297.24°)
OKLab	oklab(39.34% 0.0147 -0.1239)
OKLCH	oklch(39.34% 0.125 276.7)
XYZ	xyz(7.5113, 5.6889, 23.6192)
Luminance	0.0569 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373B87 #878337

analogous

#376387 #373B87 #5B3787

triadic

#373B87 #87373B #3B8737

tetradic

#373B87 #873763 #878337 #37875B

square

#373B87 #873763 #878337 #37875B

split-complementary

#373B87 #875B37 #638737

monochromatic

#141530 #25285C #373B87 #494EB2 #7377C6

Accessibility & contrast

On white

9.82

#373B87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#373B87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373B87

9.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373B87	#FFFFFF	#000000	##FFFFFF
##373B87	1.00	9.82	2.14	9.82
#FFFFFF	9.82	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#07478A

Deuteranopia (green-blind)

#004085

Tritanopia (blue-blind)

#044D5B

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #373b87;
/* rgb */ color: rgb(55, 59, 135);
/* oklch */ color: oklch(39.3% 0.125 276.7);

Tailwind

colors: {
  custom: {
    50: '#7670aa',
    500: '#373b87',
    950: '#000000',
  },
}

SCSS

$custom: #373b87;
$custom-light: #7670aa;
$custom-dark: #000000;

JSON

{
  "hex": "#373b87",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 135
  },
  "hsl": {
    "h": 237,
    "s": 42.105,
    "l": 37.255
  },
  "oklch": {
    "l": 0.3934,
    "c": 0.12479,
    "h": 276.7
  },
  "luminance": 0.05689
}

Semantic roles & 50–950 ramp

primary

#373B87

secondary

#AFAB6B

accent

#CC56D2

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #373B87

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

Preview Lab → · Contrast checker → · Palette generator →