#51BFDB#51BFDB

#51BFDB is a light, moderate cyan. Relative luminance 0.441; OKLCH L 75.2% C 0.107 H 217.5°. Best body text is #000000 at 9.82:1 contrast (WCAG AA passes).

Color values

HEX	#51BFDB
RGB	rgb(81, 191, 219)
HSL	hsl(192, 66%, 59%)
HSV	hsv(192, 63%, 86%)
CMYK	cmyk(63%, 12.8%, 0%, 14.1%)
CIE-LAB	lab(72.31, -22.93, -23.33)
CIE-LCH	lch(72.31, 32.71, 225.50°)
OKLab	oklab(75.22% -0.0847 -0.0649)
OKLCH	oklch(75.22% 0.107 217.5)
XYZ	xyz(34.8051, 44.1217, 73.6862)
Luminance	0.4412 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BFDB #DB6D51

analogous

#51DBB2 #51BFDB #517ADB

triadic

#51BFDB #DB51BF #BFDB51

tetradic

#51BFDB #B251DB #DB6D51 #7ADB51

square

#51BFDB #B251DB #DB6D51 #7ADB51

split-complementary

#51BFDB #DB517A #DBB251

monochromatic

#1E7B93 #29A6C6 #51BFDB #84D2E5 #B6E4F0

Accessibility & contrast

On white

2.14

#51BFDB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.82

#51BFDB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BFDB

9.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BFDB	#FFFFFF	#000000	##000000
##51BFDB	1.00	2.14	9.82	9.82
#FFFFFF	2.14	1.00	21.00	21.00
#000000	9.82	21.00	1.00	1.00
##000000	9.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ADBADD

Deuteranopia (green-blind)

#99ABDB

Tritanopia (blue-blind)

#00C9C8

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #51bfdb;
/* rgb */ color: rgb(81, 191, 219);
/* oklch */ color: oklch(75.2% 0.107 217.5);

Tailwind

colors: {
  custom: {
    50: '#90d2e6',
    500: '#51bfdb',
    950: '#000000',
  },
}

SCSS

$custom: #51bfdb;
$custom-light: #90d2e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51bfdb",
  "rgb": {
    "r": 81,
    "g": 191,
    "b": 219
  },
  "hsl": {
    "h": 192.174,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.75217,
    "c": 0.10672,
    "h": 217.5
  },
  "luminance": 0.44125
}

Semantic roles & 50–950 ramp

primary

#51BFDB

secondary

#DFB4A9

accent

#623FE9

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BFDB

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

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