#37B1CC#37B1CC

#37B1CC is a light, moderate cyan. Relative luminance 0.366; OKLCH L 70.6% C 0.111 H 216.0°. Best body text is #000000 at 8.32:1 contrast (WCAG AA passes).

Color values

HEX	#37B1CC
RGB	rgb(55, 177, 204)
HSL	hsl(191, 59%, 51%)
HSV	hsv(191, 73%, 80%)
CMYK	cmyk(73%, 13.2%, 0%, 20%)
CIE-LAB	lab(66.99, -24.24, -23.31)
CIE-LCH	lch(66.99, 33.63, 223.88°)
OKLab	oklab(70.57% -0.0895 -0.065)
OKLCH	oklch(70.57% 0.111 216)
XYZ	xyz(28.1922, 36.6128, 62.6962)
Luminance	0.3662 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37B1CC #CC5237

analogous

#37CC9C #37B1CC #3767CC

triadic

#37B1CC #CC37B1 #B1CC37

tetradic

#37B1CC #9C37CC #CC5237 #67CC37

square

#37B1CC #9C37CC #CC5237 #67CC37

split-complementary

#37B1CC #CC3767 #CC9C37

monochromatic

#1C5E6D #28889E #37B1CC #68C4D8 #99D7E5

Accessibility & contrast

On white

2.52

#37B1CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.32

#37B1CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #37B1CC

8.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37B1CC	#FFFFFF	#000000	##000000
##37B1CC	1.00	2.52	8.32	8.32
#FFFFFF	2.52	1.00	21.00	21.00
#000000	8.32	21.00	1.00	1.00
##000000	8.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FACCE

Deuteranopia (green-blind)

#8A9DCC

Tritanopia (blue-blind)

#00BBB9

Achromatopsia (no color)

#A3A3A3

Design tokens & code

CSS

--color: #37b1cc;
/* rgb */ color: rgb(55, 177, 204);
/* oklch */ color: oklch(70.6% 0.111 216.0);

Tailwind

colors: {
  custom: {
    50: '#83c8db',
    500: '#37b1cc',
    950: '#000000',
  },
}

SCSS

$custom: #37b1cc;
$custom-light: #83c8db;
$custom-dark: #000000;

JSON

{
  "hex": "#37b1cc",
  "rgb": {
    "r": 55,
    "g": 177,
    "b": 204
  },
  "hsl": {
    "h": 190.872,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.70574,
    "c": 0.11061,
    "h": 216
  },
  "luminance": 0.36616
}

Semantic roles & 50–950 ramp

primary

#37B1CC

secondary

#D09A8E

accent

#6245E3

background

#F8FCFD

surface

#F0F8FB

border

#CBD1D4

text

#0C1315

muted

#7D8283

Preview Lab

Preview with #37B1CC

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

Preview Lab → · Contrast checker → · Palette generator →