#37518B#37518B

#37518B is a dark, moderate blue. Relative luminance 0.086; OKLCH L 44.4% C 0.101 H 264.5°. Best body text is #FFFFFF at 7.74:1 contrast (WCAG AA passes).

Color values

HEX	#37518B
RGB	rgb(55, 81, 139)
HSL	hsl(221, 43%, 38%)
HSV	hsv(221, 60%, 55%)
CMYK	cmyk(60.4%, 41.7%, 0%, 45.5%)
CIE-LAB	lab(35.12, 9.02, -35.28)
CIE-LCH	lch(35.12, 36.41, 284.34°)
OKLab	oklab(44.37% -0.0097 -0.1003)
OKLCH	oklch(44.37% 0.101 264.5)
XYZ	xyz(9.1766, 8.5604, 25.5898)
Luminance	0.0856 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37518B #8B7137

analogous

#377B8B #37518B #47378B

triadic

#37518B #8B3751 #518B37

tetradic

#37518B #8B377B #8B7137 #378B47

square

#37518B #8B377B #8B7137 #378B47

split-complementary

#37518B #8B4737 #7B8B37

monochromatic

#141E33 #26375F #37518B #486BB7 #748EC8

Accessibility & contrast

On white

7.74

#37518B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#37518B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37518B

7.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37518B	#FFFFFF	#000000	##FFFFFF
##37518B	1.00	7.74	2.71	7.74
#FFFFFF	7.74	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#38578D

Deuteranopia (green-blind)

#2D4F8A

Tritanopia (blue-blind)

#005E67

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #37518b;
/* rgb */ color: rgb(55, 81, 139);
/* oklch */ color: oklch(44.4% 0.101 264.5);

Tailwind

colors: {
  custom: {
    50: '#7581ad',
    500: '#37518b',
    950: '#000000',
  },
}

SCSS

$custom: #37518b;
$custom-light: #7581ad;
$custom-dark: #000000;

JSON

{
  "hex": "#37518b",
  "rgb": {
    "r": 55,
    "g": 81,
    "b": 139
  },
  "hsl": {
    "h": 221.429,
    "s": 43.299,
    "l": 38.039
  },
  "oklch": {
    "l": 0.44373,
    "c": 0.10073,
    "h": 264.5
  },
  "luminance": 0.08561
}

Semantic roles & 50–950 ramp

primary

#37518B

secondary

#B19C6D

accent

#AC55D3

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#090A10

muted

#7B7C7F

Preview Lab

Preview with #37518B

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

Preview Lab → · Contrast checker → · Palette generator →