#37A1BB#37A1BB

#37A1BB is a light, moderate cyan. Relative luminance 0.299; OKLCH L 66.0% C 0.101 H 217.6°. Best body text is #000000 at 6.98:1 contrast (WCAG AA passes).

Color values

HEX	#37A1BB
RGB	rgb(55, 161, 187)
HSL	hsl(192, 55%, 47%)
HSV	hsv(192, 71%, 73%)
CMYK	cmyk(70.6%, 13.9%, 0%, 26.7%)
CIE-LAB	lab(61.56, -21.43, -22.16)
CIE-LCH	lch(61.56, 30.82, 225.95°)
OKLab	oklab(66% -0.0803 -0.0618)
OKLCH	oklch(66% 0.101 217.6)
XYZ	xyz(23.2863, 29.8872, 51.5456)
Luminance	0.2989 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37A1BB #BB5137

analogous

#37BB93 #37A1BB #375FBB

triadic

#37A1BB #BB37A1 #A1BB37

tetradic

#37A1BB #9337BB #BB5137 #5FBB37

square

#37A1BB #9337BB #BB5137 #5FBB37

split-complementary

#37A1BB #BB375F #BB9337

monochromatic

#1B505C #29788C #37A1BB #5FBAD0 #8ECEDE

Accessibility & contrast

On white

3.01

#37A1BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.98

#37A1BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #37A1BB

6.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37A1BB	#FFFFFF	#000000	##000000
##37A1BB	1.00	3.01	6.98	6.98
#FFFFFF	3.01	1.00	21.00	21.00
#000000	6.98	21.00	1.00	1.00
##000000	6.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#909CBC

Deuteranopia (green-blind)

#7E8FBB

Tritanopia (blue-blind)

#00AAA9

Achromatopsia (no color)

#959595

Design tokens & code

CSS

--color: #37a1bb;
/* rgb */ color: rgb(55, 161, 187);
/* oklch */ color: oklch(66.0% 0.101 217.6);

Tailwind

colors: {
  custom: {
    50: '#7fbdcf',
    500: '#37a1bb',
    950: '#000000',
  },
}

SCSS

$custom: #37a1bb;
$custom-light: #7fbdcf;
$custom-dark: #000000;

JSON

{
  "hex": "#37a1bb",
  "rgb": {
    "r": 55,
    "g": 161,
    "b": 187
  },
  "hsl": {
    "h": 191.818,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.66002,
    "c": 0.1013,
    "h": 217.6
  },
  "luminance": 0.2989
}

Semantic roles & 50–950 ramp

primary

#37A1BB

secondary

#C99385

accent

#674ADE

background

#F8FBFC

surface

#F0F6F9

border

#CBD0D2

text

#0B1213

muted

#7C8182

Preview Lab

Preview with #37A1BB

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

Preview Lab → · Contrast checker → · Palette generator →