#51B5CE#51B5CE

#51B5CE is a light, moderate cyan. Relative luminance 0.393; OKLCH L 72.4% C 0.099 H 216.8°. Best body text is #000000 at 8.85:1 contrast (WCAG AA passes).

Color values

HEX	#51B5CE
RGB	rgb(81, 181, 206)
HSL	hsl(192, 56%, 56%)
HSV	hsv(192, 61%, 81%)
CMYK	cmyk(60.7%, 12.1%, 0%, 19.2%)
CIE-LAB	lab(68.93, -21.72, -21.38)
CIE-LCH	lch(68.93, 30.47, 224.55°)
OKLab	oklab(72.36% -0.0793 -0.0594)
OKLCH	oklch(72.36% 0.099 216.8)
XYZ	xyz(31.0533, 39.2502, 64.3201)
Luminance	0.3925 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B5CE #CE6A51

analogous

#51CEA9 #51B5CE #5177CE

triadic

#51B5CE #CE51B5 #B5CE51

tetradic

#51B5CE #A951CE #CE6A51 #77CE51

square

#51B5CE #A951CE #CE6A51 #77CE51

split-complementary

#51B5CE #CE5177 #CEA951

monochromatic

#246E80 #3297B0 #51B5CE #81C9DB #B1DEE9

Accessibility & contrast

On white

2.37

#51B5CE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.85

#51B5CE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B5CE

8.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B5CE	#FFFFFF	#000000	##000000
##51B5CE	1.00	2.37	8.85	8.85
#FFFFFF	2.37	1.00	21.00	21.00
#000000	8.85	21.00	1.00	1.00
##000000	8.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4B0CF

Deuteranopia (green-blind)

#92A2CE

Tritanopia (blue-blind)

#00BEBD

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #51b5ce;
/* rgb */ color: rgb(81, 181, 206);
/* oklch */ color: oklch(72.4% 0.099 216.8);

Tailwind

colors: {
  custom: {
    50: '#8ecbdd',
    500: '#51b5ce',
    950: '#000000',
  },
}

SCSS

$custom: #51b5ce;
$custom-light: #8ecbdd;
$custom-dark: #000000;

JSON

{
  "hex": "#51b5ce",
  "rgb": {
    "r": 81,
    "g": 181,
    "b": 206
  },
  "hsl": {
    "h": 192,
    "s": 56.054,
    "l": 56.275
  },
  "oklch": {
    "l": 0.72357,
    "c": 0.09907,
    "h": 216.8
  },
  "luminance": 0.39253
}

Semantic roles & 50–950 ramp

primary

#51B5CE

secondary

#D7AEA4

accent

#6748DF

background

#F9FCFD

surface

#F2F8FB

border

#CCD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #51B5CE

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

Preview Lab → · Contrast checker → · Palette generator →