#37A5CB#37A5CB

#37A5CB is a light, moderate cyan. Relative luminance 0.320; OKLCH L 67.7% C 0.111 H 225.4°. Best body text is #000000 at 7.41:1 contrast (WCAG AA passes).

Color values

HEX	#37A5CB
RGB	rgb(55, 165, 203)
HSL	hsl(195, 59%, 51%)
HSV	hsv(195, 73%, 80%)
CMYK	cmyk(72.9%, 18.7%, 0%, 20.4%)
CIE-LAB	lab(63.37, -18.34, -28.31)
CIE-LCH	lch(63.37, 33.73, 237.06°)
OKLab	oklab(67.66% -0.0781 -0.0793)
OKLCH	oklch(67.66% 0.111 225.4)
XYZ	xyz(25.8058, 32.0313, 61.3109)
Luminance	0.3203 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37A5CB #CB5D37

analogous

#37CBA7 #37A5CB #375BCB

triadic

#37A5CB #CB37A5 #A5CB37

tetradic

#37A5CB #A737CB #CB5D37 #5BCB37

square

#37A5CB #A737CB #CB5D37 #5BCB37

split-complementary

#37A5CB #CB375B #CBA737

monochromatic

#1C576C #297F9C #37A5CB #68BBD8 #98D1E4

Accessibility & contrast

On white

2.84

#37A5CB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.41

#37A5CB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #37A5CB

7.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37A5CB	#FFFFFF	#000000	##000000
##37A5CB	1.00	2.84	7.41	7.41
#FFFFFF	2.84	1.00	21.00	21.00
#000000	7.41	21.00	1.00	1.00
##000000	7.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#90A2CD

Deuteranopia (green-blind)

#7C93CB

Tritanopia (blue-blind)

#00B0B1

Achromatopsia (no color)

#999999

Design tokens & code

CSS

--color: #37a5cb;
/* rgb */ color: rgb(55, 165, 203);
/* oklch */ color: oklch(67.7% 0.111 225.4);

Tailwind

colors: {
  custom: {
    50: '#82bfdb',
    500: '#37a5cb',
    950: '#000000',
  },
}

SCSS

$custom: #37a5cb;
$custom-light: #82bfdb;
$custom-dark: #000000;

JSON

{
  "hex": "#37a5cb",
  "rgb": {
    "r": 55,
    "g": 165,
    "b": 203
  },
  "hsl": {
    "h": 195.405,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.67658,
    "c": 0.11132,
    "h": 225.4
  },
  "luminance": 0.32034
}

Semantic roles & 50–950 ramp

primary

#37A5CB

secondary

#D09F8E

accent

#6E46E2

background

#F8FBFD

surface

#F0F7FA

border

#CBD0D3

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #37A5CB

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

Preview Lab → · Contrast checker → · Palette generator →