#37577B#37577B

#37577B is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 44.9% C 0.070 H 252.3°. Best body text is #FFFFFF at 7.47:1 contrast (WCAG AA passes).

Color values

HEX	#37577B
RGB	rgb(55, 87, 123)
HSL	hsl(212, 38%, 35%)
HSV	hsv(212, 55%, 48%)
CMYK	cmyk(55.3%, 29.3%, 0%, 51.8%)
CIE-LAB	lab(36.10, -0.45, -23.93)
CIE-LCH	lch(36.10, 23.93, 268.92°)
OKLab	oklab(44.85% -0.0214 -0.0671)
OKLCH	oklch(44.85% 0.07 252.3)
XYZ	xyz(8.5576, 9.0580, 20.0325)
Luminance	0.0906 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37577B #7B5B37

analogous

#37797B #37577B #39377B

triadic

#37577B #7B3757 #577B37

tetradic

#37577B #7B3779 #7B5B37 #377B39

square

#37577B #7B3779 #7B5B37 #377B39

split-complementary

#37577B #7B3937 #797B37

monochromatic

#111B26 #243951 #37577B #4A75A5 #6E94BE

Accessibility & contrast

On white

7.47

#37577B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#37577B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37577B

7.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37577B	#FFFFFF	#000000	##FFFFFF
##37577B	1.00	7.47	2.81	7.47
#FFFFFF	7.47	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#48597D

Deuteranopia (green-blind)

#40527A

Tritanopia (blue-blind)

#105F64

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #37577b;
/* rgb */ color: rgb(55, 87, 123);
/* oklch */ color: oklch(44.9% 0.070 252.3);

Tailwind

colors: {
  custom: {
    50: '#7386a1',
    500: '#37577b',
    950: '#000000',
  },
}

SCSS

$custom: #37577b;
$custom-light: #7386a1;
$custom-dark: #000000;

JSON

{
  "hex": "#37577b",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 123
  },
  "hsl": {
    "h": 211.765,
    "s": 38.202,
    "l": 34.902
  },
  "oklch": {
    "l": 0.44852,
    "c": 0.07049,
    "h": 252.3
  },
  "luminance": 0.09059
}

Semantic roles & 50–950 ramp

primary

#37577B

secondary

#A78967

accent

#975ACE

background

#F7F8F9

surface

#EDEFF2

border

#C8CACC

text

#080B0F

muted

#7B7C7E

Preview Lab

Preview with #37577B

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

Preview Lab → · Contrast checker → · Palette generator →