#373F87#373F87

#373F87 is a dark, moderate blue. Relative luminance 0.061; OKLCH L 40.2% C 0.119 H 274.9°. Best body text is #FFFFFF at 9.44:1 contrast (WCAG AA passes).

Color values

HEX	#373F87
RGB	rgb(55, 63, 135)
HSL	hsl(234, 42%, 37%)
HSV	hsv(234, 59%, 53%)
CMYK	cmyk(59.3%, 53.3%, 0%, 47.1%)
CIE-LAB	lab(29.70, 19.58, -41.49)
CIE-LCH	lch(29.70, 45.88, 295.27°)
OKLab	oklab(40.16% 0.0102 -0.1187)
OKLCH	oklch(40.16% 0.119 274.9)
XYZ	xyz(7.7248, 6.1159, 23.6904)
Luminance	0.0612 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373F87 #877F37

analogous

#376787 #373F87 #573787

triadic

#373F87 #87373F #3F8737

tetradic

#373F87 #873767 #877F37 #378757

square

#373F87 #873767 #877F37 #378757

split-complementary

#373F87 #875737 #678737

monochromatic

#141630 #252B5C #373F87 #4953B2 #737BC6

Accessibility & contrast

On white

9.44

#373F87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#373F87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373F87

9.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373F87	#FFFFFF	#000000	##FFFFFF
##373F87	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)

#17498A

Deuteranopia (green-blind)

#054385

Tritanopia (blue-blind)

#034F5C

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #373f87;
/* rgb */ color: rgb(55, 63, 135);
/* oklch */ color: oklch(40.2% 0.119 274.9);

Tailwind

colors: {
  custom: {
    50: '#7573aa',
    500: '#373f87',
    950: '#000000',
  },
}

SCSS

$custom: #373f87;
$custom-light: #7573aa;
$custom-dark: #000000;

JSON

{
  "hex": "#373f87",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 135
  },
  "hsl": {
    "h": 234,
    "s": 42.105,
    "l": 37.255
  },
  "oklch": {
    "l": 0.40157,
    "c": 0.11916,
    "h": 274.9
  },
  "luminance": 0.06117
}

Semantic roles & 50–950 ramp

primary

#373F87

secondary

#AFA86B

accent

#C656D2

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #373F87

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

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