#37A5BB#37A5BB

#37A5BB is a light, moderate cyan. Relative luminance 0.313; OKLCH L 67.0% C 0.102 H 213.8°. Best body text is #000000 at 7.26:1 contrast (WCAG AA passes).

Color values

HEX	#37A5BB
RGB	rgb(55, 165, 187)
HSL	hsl(190, 55%, 47%)
HSV	hsv(190, 71%, 73%)
CMYK	cmyk(70.6%, 11.8%, 0%, 26.7%)
CIE-LAB	lab(62.77, -23.50, -20.31)
CIE-LCH	lch(62.77, 31.06, 220.84°)
OKLab	oklab(66.97% -0.0843 -0.0565)
OKLCH	oklch(66.97% 0.102 213.8)
XYZ	xyz(23.9965, 31.3076, 51.7824)
Luminance	0.3131 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37A5BB #BB4D37

analogous

#37BB8F #37A5BB #3763BB

triadic

#37A5BB #BB37A5 #A5BB37

tetradic

#37A5BB #8F37BB #BB4D37 #63BB37

square

#37A5BB #8F37BB #BB4D37 #63BB37

split-complementary

#37A5BB #BB3763 #BB8F37

monochromatic

#1B525C #297B8C #37A5BB #5FBDD0 #8ED1DE

Accessibility & contrast

On white

2.89

#37A5BB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.26

#37A5BB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #37A5BB

7.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37A5BB	#FFFFFF	#000000	##000000
##37A5BB	1.00	2.89	7.26	7.26
#FFFFFF	2.89	1.00	21.00	21.00
#000000	7.26	21.00	1.00	1.00
##000000	7.26	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95A0BC

Deuteranopia (green-blind)

#8292BB

Tritanopia (blue-blind)

#00AEAC

Achromatopsia (no color)

#989898

Design tokens & code

CSS

--color: #37a5bb;
/* rgb */ color: rgb(55, 165, 187);
/* oklch */ color: oklch(67.0% 0.102 213.8);

Tailwind

colors: {
  custom: {
    50: '#80c0cf',
    500: '#37a5bb',
    950: '#000000',
  },
}

SCSS

$custom: #37a5bb;
$custom-light: #80c0cf;
$custom-dark: #000000;

JSON

{
  "hex": "#37a5bb",
  "rgb": {
    "r": 55,
    "g": 165,
    "b": 187
  },
  "hsl": {
    "h": 190,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.66975,
    "c": 0.10154,
    "h": 213.8
  },
  "luminance": 0.3131
}

Semantic roles & 50–950 ramp

primary

#37A5BB

secondary

#C99085

accent

#634ADE

background

#F8FBFC

surface

#F0F7F9

border

#CBD0D2

text

#0B1213

muted

#7C8182

Preview Lab

Preview with #37A5BB

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

Preview Lab → · Contrast checker → · Palette generator →