#37A5D9#37A5D9

#37A5D9 is a light, vivid cyan. Relative luminance 0.327; OKLCH L 68.3% C 0.123 H 233.6°. Best body text is #000000 at 7.55:1 contrast (WCAG AA passes).

Color values

HEX	#37A5D9
RGB	rgb(55, 165, 217)
HSL	hsl(199, 68%, 53%)
HSV	hsv(199, 75%, 85%)
CMYK	cmyk(74.7%, 24%, 0%, 14.9%)
CIE-LAB	lab(63.94, -13.67, -35.19)
CIE-LCH	lch(63.94, 37.76, 248.77°)
OKLab	oklab(68.3% -0.0731 -0.0991)
OKLCH	oklch(68.3% 0.123 233.6)
XYZ	xyz(27.5500, 32.7290, 70.4975)
Luminance	0.3273 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37A5D9 #D96B37

analogous

#37D9BC #37A5D9 #3754D9

triadic

#37A5D9 #D937A5 #A5D937

tetradic

#37A5D9 #BC37D9 #D96B37 #54D937

square

#37A5D9 #BC37D9 #D96B37 #54D937

split-complementary

#37A5D9 #D93754 #D9BC37

monochromatic

#185D7E #2283B1 #37A5D9 #6ABCE3 #9ED3ED

Accessibility & contrast

On white

2.78

#37A5D9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.55

#37A5D9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #37A5D9

7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37A5D9	#FFFFFF	#000000	##000000
##37A5D9	1.00	2.78	7.55	7.55
#FFFFFF	2.78	1.00	21.00	21.00
#000000	7.55	21.00	1.00	1.00
##000000	7.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8BA4DB

Deuteranopia (green-blind)

#7694D8

Tritanopia (blue-blind)

#00B3B7

Achromatopsia (no color)

#9B9B9B

Design tokens & code

CSS

--color: #37a5d9;
/* rgb */ color: rgb(55, 165, 217);
/* oklch */ color: oklch(68.3% 0.123 233.6);

Tailwind

colors: {
  custom: {
    50: '#84bfe5',
    500: '#37a5d9',
    950: '#000000',
  },
}

SCSS

$custom: #37a5d9;
$custom-light: #84bfe5;
$custom-dark: #000000;

JSON

{
  "hex": "#37a5d9",
  "rgb": {
    "r": 55,
    "g": 165,
    "b": 217
  },
  "hsl": {
    "h": 199.259,
    "s": 68.067,
    "l": 53.333
  },
  "oklch": {
    "l": 0.68304,
    "c": 0.12316,
    "h": 233.6
  },
  "luminance": 0.32732
}

Semantic roles & 50–950 ramp

primary

#37A5D9

secondary

#D9A993

accent

#753DEB

background

#F8FBFE

surface

#F0F7FC

border

#CBD0D5

text

#0C1215

muted

#7D8184

Preview Lab

Preview with #37A5D9

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

Preview Lab → · Contrast checker → · Palette generator →