#37B1CB#37B1CB

#37B1CB is a light, moderate cyan. Relative luminance 0.366; OKLCH L 70.5% C 0.110 H 215.3°. Best body text is #000000 at 8.31:1 contrast (WCAG AA passes).

Color values

HEX	#37B1CB
RGB	rgb(55, 177, 203)
HSL	hsl(191, 59%, 51%)
HSV	hsv(191, 73%, 80%)
CMYK	cmyk(72.9%, 12.8%, 0%, 20.4%)
CIE-LAB	lab(66.95, -24.56, -22.81)
CIE-LCH	lch(66.95, 33.52, 222.89°)
OKLab	oklab(70.53% -0.0899 -0.0636)
OKLCH	oklch(70.53% 0.11 215.3)
XYZ	xyz(28.0726, 36.5650, 62.0666)
Luminance	0.3657 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37B1CB #CB5137

analogous

#37CB9B #37B1CB #3767CB

triadic

#37B1CB #CB37B1 #B1CB37

tetradic

#37B1CB #9B37CB #CB5137 #67CB37

square

#37B1CB #9B37CB #CB5137 #67CB37

split-complementary

#37B1CB #CB3767 #CB9B37

monochromatic

#1C5E6C #29889C #37B1CB #68C4D8 #98D7E4

Accessibility & contrast

On white

2.53

#37B1CB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.31

#37B1CB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #37B1CB

8.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37B1CB	#FFFFFF	#000000	##000000
##37B1CB	1.00	2.53	8.31	8.31
#FFFFFF	2.53	1.00	21.00	21.00
#000000	8.31	21.00	1.00	1.00
##000000	8.31	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FABCC

Deuteranopia (green-blind)

#8B9CCB

Tritanopia (blue-blind)

#00BBB9

Achromatopsia (no color)

#A3A3A3

Design tokens & code

CSS

--color: #37b1cb;
/* rgb */ color: rgb(55, 177, 203);
/* oklch */ color: oklch(70.5% 0.110 215.3);

Tailwind

colors: {
  custom: {
    50: '#83c8da',
    500: '#37b1cb',
    950: '#000000',
  },
}

SCSS

$custom: #37b1cb;
$custom-light: #83c8da;
$custom-dark: #000000;

JSON

{
  "hex": "#37b1cb",
  "rgb": {
    "r": 55,
    "g": 177,
    "b": 203
  },
  "hsl": {
    "h": 190.541,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.70533,
    "c": 0.11011,
    "h": 215.3
  },
  "luminance": 0.36568
}

Semantic roles & 50–950 ramp

primary

#37B1CB

secondary

#D09A8E

accent

#6146E2

background

#F8FCFD

surface

#F0F8FA

border

#CBD1D3

text

#0C1315

muted

#7D8283

Preview Lab

Preview with #37B1CB

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

Preview Lab → · Contrast checker → · Palette generator →