#37558B#37558B

#37558B is a mid, moderate blue. Relative luminance 0.092; OKLCH L 45.3% C 0.096 H 261.4°. Best body text is #FFFFFF at 7.41:1 contrast (WCAG AA passes).

Color values

HEX	#37558B
RGB	rgb(55, 85, 139)
HSL	hsl(219, 43%, 38%)
HSV	hsv(219, 60%, 55%)
CMYK	cmyk(60.4%, 38.8%, 0%, 45.5%)
CIE-LAB	lab(36.31, 6.41, -33.39)
CIE-LCH	lch(36.31, 34.00, 280.86°)
OKLab	oklab(45.3% -0.0144 -0.0947)
OKLCH	oklch(45.3% 0.096 261.4)
XYZ	xyz(9.4826, 9.1725, 25.6918)
Luminance	0.0917 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37558B #8B6D37

analogous

#377F8B #37558B #43378B

triadic

#37558B #8B3755 #558B37

tetradic

#37558B #8B377F #8B6D37 #378B43

square

#37558B #8B377F #8B6D37 #378B43

split-complementary

#37558B #8B4337 #7F8B37

monochromatic

#141F33 #263A5F #37558B #4870B7 #7492C8

Accessibility & contrast

On white

7.41

#37558B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#37558B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37558B

7.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37558B	#FFFFFF	#000000	##FFFFFF
##37558B	1.00	7.41	2.83	7.41
#FFFFFF	7.41	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E5A8D

Deuteranopia (green-blind)

#33528A

Tritanopia (blue-blind)

#006169

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #37558b;
/* rgb */ color: rgb(55, 85, 139);
/* oklch */ color: oklch(45.3% 0.096 261.4);

Tailwind

colors: {
  custom: {
    50: '#7584ad',
    500: '#37558b',
    950: '#000000',
  },
}

SCSS

$custom: #37558b;
$custom-light: #7584ad;
$custom-dark: #000000;

JSON

{
  "hex": "#37558b",
  "rgb": {
    "r": 55,
    "g": 85,
    "b": 139
  },
  "hsl": {
    "h": 218.571,
    "s": 43.299,
    "l": 38.039
  },
  "oklch": {
    "l": 0.45295,
    "c": 0.09577,
    "h": 261.4
  },
  "luminance": 0.09173
}

Semantic roles & 50–950 ramp

primary

#37558B

secondary

#B1996D

accent

#A655D3

background

#F7F8FA

surface

#EDEFF4

border

#C8CACE

text

#090A10

muted

#7B7C7F

Preview Lab

Preview with #37558B

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

Preview Lab → · Contrast checker → · Palette generator →