#37A3BC#37A3BC

#37A3BC is a light, moderate cyan. Relative luminance 0.306; OKLCH L 66.5% C 0.102 H 216.5°. Best body text is #000000 at 7.13:1 contrast (WCAG AA passes).

Color values

HEX	#37A3BC
RGB	rgb(55, 163, 188)
HSL	hsl(191, 55%, 48%)
HSV	hsv(191, 71%, 74%)
CMYK	cmyk(70.7%, 13.3%, 0%, 26.3%)
CIE-LAB	lab(62.20, -22.15, -21.74)
CIE-LCH	lch(62.20, 31.03, 224.46°)
OKLab	oklab(66.53% -0.0819 -0.0606)
OKLCH	oklch(66.53% 0.102 216.5)
XYZ	xyz(23.7460, 30.6347, 52.2288)
Luminance	0.3064 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37A3BC #BC5037

analogous

#37BC92 #37A3BC #3761BC

triadic

#37A3BC #BC37A3 #A3BC37

tetradic

#37A3BC #9237BC #BC5037 #61BC37

square

#37A3BC #9237BC #BC5037 #61BC37

split-complementary

#37A3BC #BC3761 #BC9237

monochromatic

#1B515D #297A8D #37A3BC #60BBD0 #8FCFDE

Accessibility & contrast

On white

2.95

#37A3BC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.13

#37A3BC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #37A3BC

7.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37A3BC	#FFFFFF	#000000	##000000
##37A3BC	1.00	2.95	7.13	7.13
#FFFFFF	2.95	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)

#929EBD

Deuteranopia (green-blind)

#8090BC

Tritanopia (blue-blind)

#00ACAB

Achromatopsia (no color)

#969696

Design tokens & code

CSS

--color: #37a3bc;
/* rgb */ color: rgb(55, 163, 188);
/* oklch */ color: oklch(66.5% 0.102 216.5);

Tailwind

colors: {
  custom: {
    50: '#80bed0',
    500: '#37a3bc',
    950: '#000000',
  },
}

SCSS

$custom: #37a3bc;
$custom-light: #80bed0;
$custom-dark: #000000;

JSON

{
  "hex": "#37a3bc",
  "rgb": {
    "r": 55,
    "g": 163,
    "b": 188
  },
  "hsl": {
    "h": 191.278,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.6653,
    "c": 0.10188,
    "h": 216.5
  },
  "luminance": 0.30637
}

Semantic roles & 50–950 ramp

primary

#37A3BC

secondary

#C99286

accent

#664ADE

background

#F8FBFC

surface

#F0F7F9

border

#CBD0D2

text

#0B1214

muted

#7C8182

Preview Lab

Preview with #37A3BC

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

Preview Lab → · Contrast checker → · Palette generator →