#51B3DB#51B3DB

#51B3DB is a light, moderate cyan. Relative luminance 0.391; OKLCH L 72.4% C 0.108 H 227.9°. Best body text is #000000 at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#51B3DB
RGB	rgb(81, 179, 219)
HSL	hsl(197, 66%, 59%)
HSV	hsv(197, 63%, 86%)
CMYK	cmyk(63%, 18.3%, 0%, 14.1%)
CIE-LAB	lab(68.82, -16.72, -28.68)
CIE-LCH	lch(68.82, 33.20, 239.75°)
OKLab	oklab(72.43% -0.0723 -0.0801)
OKLCH	oklch(72.43% 0.108 227.9)
XYZ	xyz(32.2946, 39.1007, 72.8493)
Luminance	0.3910 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B3DB #DB7951

analogous

#51DBBE #51B3DB #516EDB

triadic

#51B3DB #DB51B3 #B3DB51

tetradic

#51B3DB #BE51DB #DB7951 #6EDB51

square

#51B3DB #BE51DB #DB7951 #6EDB51

split-complementary

#51B3DB #DB516E #DBBE51

monochromatic

#1E7193 #2998C6 #51B3DB #84C9E5 #B6DFF0

Accessibility & contrast

On white

2.38

#51B3DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.82

#51B3DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B3DB

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B3DB	#FFFFFF	#000000	##000000
##51B3DB	1.00	2.38	8.82	8.82
#FFFFFF	2.38	1.00	21.00	21.00
#000000	8.82	21.00	1.00	1.00
##000000	8.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EB0DD

Deuteranopia (green-blind)

#8BA2DA

Tritanopia (blue-blind)

#00BEC0

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #51b3db;
/* rgb */ color: rgb(81, 179, 219);
/* oklch */ color: oklch(72.4% 0.108 227.9);

Tailwind

colors: {
  custom: {
    50: '#8fc9e6',
    500: '#51b3db',
    950: '#000000',
  },
}

SCSS

$custom: #51b3db;
$custom-light: #8fc9e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51b3db",
  "rgb": {
    "r": 81,
    "g": 179,
    "b": 219
  },
  "hsl": {
    "h": 197.391,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.72428,
    "c": 0.1079,
    "h": 227.9
  },
  "luminance": 0.39104
}

Semantic roles & 50–950 ramp

primary

#51B3DB

secondary

#DFB8A9

accent

#703FE9

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B3DB

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

Preview Lab → · Contrast checker → · Palette generator →