#37A5CF#37A5CF

#37A5CF is a light, moderate cyan. Relative luminance 0.322; OKLCH L 67.8% C 0.114 H 228.0°. Best body text is #000000 at 7.45:1 contrast (WCAG AA passes).

Color values

HEX	#37A5CF
RGB	rgb(55, 165, 207)
HSL	hsl(197, 61%, 51%)
HSV	hsv(197, 73%, 81%)
CMYK	cmyk(73.4%, 20.3%, 0%, 18.8%)
CIE-LAB	lab(63.53, -17.02, -30.29)
CIE-LCH	lch(63.53, 34.74, 240.67°)
OKLab	oklab(67.84% -0.0766 -0.085)
OKLCH	oklch(67.84% 0.114 228)
XYZ	xyz(26.2886, 32.2244, 63.8538)
Luminance	0.3223 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37A5CF #CF6137

analogous

#37CFAD #37A5CF #3759CF

triadic

#37A5CF #CF37A5 #A5CF37

tetradic

#37A5CF #AD37CF #CF6137 #59CF37

square

#37A5CF #AD37CF #CF6137 #59CF37

split-complementary

#37A5CF #CF3759 #CFAD37

monochromatic

#1B5971 #2780A2 #37A5CF #68BBDB #9AD1E7

Accessibility & contrast

On white

2.82

#37A5CF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.45

#37A5CF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #37A5CF

7.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37A5CF	#FFFFFF	#000000	##000000
##37A5CF	1.00	2.82	7.45	7.45
#FFFFFF	2.82	1.00	21.00	21.00
#000000	7.45	21.00	1.00	1.00
##000000	7.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8FA2D1

Deuteranopia (green-blind)

#7A93CE

Tritanopia (blue-blind)

#00B1B3

Achromatopsia (no color)

#9A9A9A

Design tokens & code

CSS

--color: #37a5cf;
/* rgb */ color: rgb(55, 165, 207);
/* oklch */ color: oklch(67.8% 0.114 228.0);

Tailwind

colors: {
  custom: {
    50: '#82bfdd',
    500: '#37a5cf',
    950: '#000000',
  },
}

SCSS

$custom: #37a5cf;
$custom-light: #82bfdd;
$custom-dark: #000000;

JSON

{
  "hex": "#37a5cf",
  "rgb": {
    "r": 55,
    "g": 165,
    "b": 207
  },
  "hsl": {
    "h": 196.579,
    "s": 61.29,
    "l": 51.373
  },
  "oklch": {
    "l": 0.67838,
    "c": 0.11444,
    "h": 228
  },
  "luminance": 0.32227
}

Semantic roles & 50–950 ramp

primary

#37A5CF

secondary

#D2A28F

accent

#7043E4

background

#F8FBFD

surface

#F0F7FB

border

#CBD0D4

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #37A5CF

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

Preview Lab → · Contrast checker → · Palette generator →