#37A3BB#37A3BB

#37A3BB is a light, moderate cyan. Relative luminance 0.306; OKLCH L 66.5% C 0.101 H 215.7°. Best body text is #000000 at 7.12:1 contrast (WCAG AA passes).

Color values

HEX	#37A3BB
RGB	rgb(55, 163, 187)
HSL	hsl(191, 55%, 47%)
HSV	hsv(191, 71%, 73%)
CMYK	cmyk(70.6%, 12.8%, 0%, 26.7%)
CIE-LAB	lab(62.16, -22.47, -21.23)
CIE-LCH	lch(62.16, 30.91, 223.38°)
OKLab	oklab(66.49% -0.0823 -0.0592)
OKLCH	oklch(66.49% 0.101 215.7)
XYZ	xyz(23.6386, 30.5918, 51.6630)
Luminance	0.3059 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37A3BB #BB4F37

analogous

#37BB91 #37A3BB #3761BB

triadic

#37A3BB #BB37A3 #A3BB37

tetradic

#37A3BB #9137BB #BB4F37 #61BB37

square

#37A3BB #9137BB #BB4F37 #61BB37

split-complementary

#37A3BB #BB3761 #BB9137

monochromatic

#1B515C #297A8C #37A3BB #5FBBD0 #8ECFDE

Accessibility & contrast

On white

2.95

#37A3BB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.12

#37A3BB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #37A3BB

7.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37A3BB	#FFFFFF	#000000	##000000
##37A3BB	1.00	2.95	7.12	7.12
#FFFFFF	2.95	1.00	21.00	21.00
#000000	7.12	21.00	1.00	1.00
##000000	7.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#929EBC

Deuteranopia (green-blind)

#8090BB

Tritanopia (blue-blind)

#00ACAA

Achromatopsia (no color)

#969696

Design tokens & code

CSS

--color: #37a3bb;
/* rgb */ color: rgb(55, 163, 187);
/* oklch */ color: oklch(66.5% 0.101 215.7);

Tailwind

colors: {
  custom: {
    50: '#80becf',
    500: '#37a3bb',
    950: '#000000',
  },
}

SCSS

$custom: #37a3bb;
$custom-light: #80becf;
$custom-dark: #000000;

JSON

{
  "hex": "#37a3bb",
  "rgb": {
    "r": 55,
    "g": 163,
    "b": 187
  },
  "hsl": {
    "h": 190.909,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.66489,
    "c": 0.10136,
    "h": 215.7
  },
  "luminance": 0.30594
}

Semantic roles & 50–950 ramp

primary

#37A3BB

secondary

#C99185

accent

#654ADE

background

#F8FBFC

surface

#F0F7F9

border

#CBD0D2

text

#0B1213

muted

#7C8182

Preview Lab

Preview with #37A3BB

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

Preview Lab → · Contrast checker → · Palette generator →