#37B5D7#37B5D7

#37B5D7 is a light, moderate cyan. Relative luminance 0.388; OKLCH L 72.0% C 0.117 H 220.2°. Best body text is #000000 at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#37B5D7
RGB	rgb(55, 181, 215)
HSL	hsl(193, 67%, 53%)
HSV	hsv(193, 74%, 84%)
CMYK	cmyk(74.4%, 15.8%, 0%, 15.7%)
CIE-LAB	lab(68.58, -22.78, -26.92)
CIE-LCH	lch(68.58, 35.26, 229.77°)
OKLab	oklab(71.99% -0.0891 -0.0753)
OKLCH	oklch(71.99% 0.117 220.2)
XYZ	xyz(30.3600, 38.7626, 70.1587)
Luminance	0.3877 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37B5D7 #D75937

analogous

#37D7A9 #37B5D7 #3765D7

triadic

#37B5D7 #D737B5 #B5D737

tetradic

#37B5D7 #A937D7 #D75937 #65D737

square

#37B5D7 #A937D7 #D75937 #65D737

split-complementary

#37B5D7 #D73765 #D7A937

monochromatic

#19667B #2390AE #37B5D7 #6AC8E1 #9DDBEB

Accessibility & contrast

On white

2.40

#37B5D7 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.75

#37B5D7 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #37B5D7

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37B5D7	#FFFFFF	#000000	##000000
##37B5D7	1.00	2.40	8.75	8.75
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.75	21.00	1.00	1.00
##000000	8.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0B0D9

Deuteranopia (green-blind)

#8BA0D7

Tritanopia (blue-blind)

#00C0C0

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #37b5d7;
/* rgb */ color: rgb(55, 181, 215);
/* oklch */ color: oklch(72.0% 0.117 220.2);

Tailwind

colors: {
  custom: {
    50: '#85cbe3',
    500: '#37b5d7',
    950: '#000000',
  },
}

SCSS

$custom: #37b5d7;
$custom-light: #85cbe3;
$custom-dark: #000000;

JSON

{
  "hex": "#37b5d7",
  "rgb": {
    "r": 55,
    "g": 181,
    "b": 215
  },
  "hsl": {
    "h": 192.75,
    "s": 66.667,
    "l": 52.941
  },
  "oklch": {
    "l": 0.71989,
    "c": 0.11662,
    "h": 220.2
  },
  "luminance": 0.38766
}

Semantic roles & 50–950 ramp

primary

#37B5D7

secondary

#D7A192

accent

#633EEA

background

#F8FCFD

surface

#F0F8FB

border

#CBD1D4

text

#0D1315

muted

#7D8283

Preview Lab

Preview with #37B5D7

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

Preview Lab → · Contrast checker → · Palette generator →