#51BFDD#51BFDD

#51BFDD is a light, moderate cyan. Relative luminance 0.442; OKLCH L 75.3% C 0.108 H 218.9°. Best body text is #000000 at 9.85:1 contrast (WCAG AA passes).

Color values

HEX	#51BFDD
RGB	rgb(81, 191, 221)
HSL	hsl(193, 67%, 59%)
HSV	hsv(193, 63%, 87%)
CMYK	cmyk(63.3%, 13.6%, 0%, 13.3%)
CIE-LAB	lab(72.38, -22.33, -24.31)
CIE-LCH	lch(72.38, 33.01, 227.44°)
OKLab	oklab(75.3% -0.084 -0.0677)
OKLCH	oklch(75.3% 0.108 218.9)
XYZ	xyz(35.0700, 44.2277, 75.0812)
Luminance	0.4423 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BFDD #DD6F51

analogous

#51DDB5 #51BFDD #5179DD

triadic

#51BFDD #DD51BF #BFDD51

tetradic

#51BFDD #B551DD #DD6F51 #79DD51

square

#51BFDD #B551DD #DD6F51 #79DD51

split-complementary

#51BFDD #DD5179 #DDB551

monochromatic

#1D7C96 #27A7C9 #51BFDD #84D2E7 #B7E5F1

Accessibility & contrast

On white

2.13

#51BFDD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.85

#51BFDD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BFDD

9.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BFDD	#FFFFFF	#000000	##000000
##51BFDD	1.00	2.13	9.85	9.85
#FFFFFF	2.13	1.00	21.00	21.00
#000000	9.85	21.00	1.00	1.00
##000000	9.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ACBADF

Deuteranopia (green-blind)

#98ABDD

Tritanopia (blue-blind)

#00C9C8

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #51bfdd;
/* rgb */ color: rgb(81, 191, 221);
/* oklch */ color: oklch(75.3% 0.108 218.9);

Tailwind

colors: {
  custom: {
    50: '#90d2e7',
    500: '#51bfdd',
    950: '#000000',
  },
}

SCSS

$custom: #51bfdd;
$custom-light: #90d2e7;
$custom-dark: #000000;

JSON

{
  "hex": "#51bfdd",
  "rgb": {
    "r": 81,
    "g": 191,
    "b": 221
  },
  "hsl": {
    "h": 192.857,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.75297,
    "c": 0.10784,
    "h": 218.9
  },
  "luminance": 0.44231
}

Semantic roles & 50–950 ramp

primary

#51BFDD

secondary

#E0B5AA

accent

#633EEA

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BFDD

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

Preview Lab → · Contrast checker → · Palette generator →