#37A1CC#37A1CC

#37A1CC is a light, moderate cyan. Relative luminance 0.307; OKLCH L 66.8% C 0.113 H 229.4°. Best body text is #000000 at 7.13:1 contrast (WCAG AA passes).

Color values

HEX	#37A1CC
RGB	rgb(55, 161, 204)
HSL	hsl(197, 59%, 51%)
HSV	hsv(197, 73%, 80%)
CMYK	cmyk(73%, 21.1%, 0%, 20%)
CIE-LAB	lab(62.22, -15.87, -30.65)
CIE-LCH	lch(62.22, 34.51, 242.62°)
OKLab	oklab(66.75% -0.0738 -0.086)
OKLCH	oklch(66.75% 0.113 229.4)
XYZ	xyz(25.2151, 30.6587, 61.7038)
Luminance	0.3066 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37A1CC #CC6237

analogous

#37CCAC #37A1CC #3756CC

triadic

#37A1CC #CC37A1 #A1CC37

tetradic

#37A1CC #AC37CC #CC6237 #56CC37

square

#37A1CC #AC37CC #CC6237 #56CC37

split-complementary

#37A1CC #CC3756 #CCAC37

monochromatic

#1C556D #287C9E #37A1CC #68B8D8 #99CFE5

Accessibility & contrast

On white

2.94

#37A1CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.13

#37A1CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #37A1CC

7.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37A1CC	#FFFFFF	#000000	##000000
##37A1CC	1.00	2.94	7.13	7.13
#FFFFFF	2.94	1.00	21.00	21.00
#000000	7.13	21.00	1.00	1.00
##000000	7.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8B9FCE

Deuteranopia (green-blind)

#7790CB

Tritanopia (blue-blind)

#00ADAF

Achromatopsia (no color)

#969696

Design tokens & code

CSS

--color: #37a1cc;
/* rgb */ color: rgb(55, 161, 204);
/* oklch */ color: oklch(66.8% 0.113 229.4);

Tailwind

colors: {
  custom: {
    50: '#82bcdb',
    500: '#37a1cc',
    950: '#000000',
  },
}

SCSS

$custom: #37a1cc;
$custom-light: #82bcdb;
$custom-dark: #000000;

JSON

{
  "hex": "#37a1cc",
  "rgb": {
    "r": 55,
    "g": 161,
    "b": 204
  },
  "hsl": {
    "h": 197.315,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.66751,
    "c": 0.11338,
    "h": 229.4
  },
  "luminance": 0.30662
}

Semantic roles & 50–950 ramp

primary

#37A1CC

secondary

#D0A18E

accent

#7345E3

background

#F8FBFD

surface

#F0F6FB

border

#CBD0D4

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #37A1CC

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

Preview Lab → · Contrast checker → · Palette generator →