#37378D#37378D

#37378D is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.0% C 0.139 H 277.8°. Best body text is #FFFFFF at 10.03:1 contrast (WCAG AA passes).

Color values

HEX	#37378D
RGB	rgb(55, 55, 141)
HSL	hsl(240, 44%, 38%)
HSV	hsv(240, 61%, 55%)
CMYK	cmyk(61%, 61%, 0%, 44.7%)
CIE-LAB	lab(28.03, 27.03, -47.92)
CIE-LCH	lch(28.03, 55.02, 299.42°)
OKLab	oklab(39.05% 0.0189 -0.1377)
OKLCH	oklch(39.05% 0.139 277.8)
XYZ	xyz(7.7479, 5.4671, 25.8411)
Luminance	0.0547 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37378D #8D8D37

analogous

#37628D #37378D #62378D

triadic

#37378D #8D3737 #378D37

tetradic

#37378D #8D3762 #8D8D37 #378D62

square

#37378D #8D3762 #8D8D37 #378D62

split-complementary

#37378D #8D6237 #628D37

monochromatic

#151535 #262661 #37378D #4949B8 #7575C9

Accessibility & contrast

On white

10.03

#37378D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#37378D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37378D

10.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37378D	#FFFFFF	#000000	##FFFFFF
##37378D	1.00	10.03	2.09	10.03
#FFFFFF	10.03	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004690

Deuteranopia (green-blind)

#003F8B

Tritanopia (blue-blind)

#004C5C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #37378d;
/* rgb */ color: rgb(55, 55, 141);
/* oklch */ color: oklch(39.0% 0.139 277.8);

Tailwind

colors: {
  custom: {
    50: '#776eaf',
    500: '#37378d',
    950: '#000000',
  },
}

SCSS

$custom: #37378d;
$custom-light: #776eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#37378d",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 141
  },
  "hsl": {
    "h": 240,
    "s": 43.878,
    "l": 38.431
  },
  "oklch": {
    "l": 0.39049,
    "c": 0.13899,
    "h": 277.8
  },
  "luminance": 0.05468
}

Semantic roles & 50–950 ramp

primary

#37378D

secondary

#B2B26E

accent

#D454D4

background

#F7F6FA

surface

#EEEBF5

border

#C9C6CF

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #37378D

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

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