#51B6CB#51B6CB

#51B6CB is a light, moderate cyan. Relative luminance 0.395; OKLCH L 72.5% C 0.098 H 213.5°. Best body text is #000000 at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#51B6CB
RGB	rgb(81, 182, 203)
HSL	hsl(190, 54%, 56%)
HSV	hsv(190, 60%, 80%)
CMYK	cmyk(60.1%, 10.3%, 0%, 20.4%)
CIE-LAB	lab(69.12, -23.11, -19.44)
CIE-LCH	lch(69.12, 30.20, 220.07°)
OKLab	oklab(72.47% -0.0815 -0.0539)
OKLCH	oklch(72.47% 0.098 213.5)
XYZ	xyz(30.8964, 39.5139, 62.4870)
Luminance	0.3952 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B6CB #CB6651

analogous

#51CBA3 #51B6CB #5179CB

triadic

#51B6CB #CB51B6 #B6CB51

tetradic

#51B6CB #A351CB #CB6651 #79CB51

square

#51B6CB #A351CB #CB6651 #79CB51

split-complementary

#51B6CB #CB5179 #CBA351

monochromatic

#256D7C #3397AC #51B6CB #80CAD9 #AFDEE7

Accessibility & contrast

On white

2.36

#51B6CB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.90

#51B6CB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B6CB

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B6CB	#FFFFFF	#000000	##000000
##51B6CB	1.00	2.36	8.90	8.90
#FFFFFF	2.36	1.00	21.00	21.00
#000000	8.90	21.00	1.00	1.00
##000000	8.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A6B0CC

Deuteranopia (green-blind)

#94A3CB

Tritanopia (blue-blind)

#00BEBC

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #51b6cb;
/* rgb */ color: rgb(81, 182, 203);
/* oklch */ color: oklch(72.5% 0.098 213.5);

Tailwind

colors: {
  custom: {
    50: '#8eccda',
    500: '#51b6cb',
    950: '#000000',
  },
}

SCSS

$custom: #51b6cb;
$custom-light: #8eccda;
$custom-dark: #000000;

JSON

{
  "hex": "#51b6cb",
  "rgb": {
    "r": 81,
    "g": 182,
    "b": 203
  },
  "hsl": {
    "h": 190.328,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.72475,
    "c": 0.09777,
    "h": 213.5
  },
  "luminance": 0.39517
}

Semantic roles & 50–950 ramp

primary

#51B6CB

secondary

#D5ABA3

accent

#644ADD

background

#F9FCFD

surface

#F2F8FA

border

#CCD1D3

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #51B6CB

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

Preview Lab → · Contrast checker → · Palette generator →