#51BBDB#51BBDB

#51BBDB is a light, moderate cyan. Relative luminance 0.424; OKLCH L 74.3% C 0.107 H 221.0°. Best body text is #000000 at 9.48:1 contrast (WCAG AA passes).

Color values

HEX	#51BBDB
RGB	rgb(81, 187, 219)
HSL	hsl(194, 66%, 59%)
HSV	hsv(194, 63%, 86%)
CMYK	cmyk(63%, 14.6%, 0%, 14.1%)
CIE-LAB	lab(71.15, -20.89, -25.11)
CIE-LCH	lch(71.15, 32.66, 230.25°)
OKLab	oklab(74.29% -0.0806 -0.0699)
OKLCH	oklch(74.29% 0.107 221)
XYZ	xyz(33.9447, 42.4009, 73.3994)
Luminance	0.4240 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBDB #DB7151

analogous

#51DBB6 #51BBDB #5176DB

triadic

#51BBDB #DB51BB #BBDB51

tetradic

#51BBDB #B651DB #DB7151 #76DB51

square

#51BBDB #B651DB #DB7151 #76DB51

split-complementary

#51BBDB #DB5176 #DBB651

monochromatic

#1E7893 #29A1C6 #51BBDB #84CFE5 #B6E3F0

Accessibility & contrast

On white

2.22

#51BBDB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.48

#51BBDB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBDB

9.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBDB	#FFFFFF	#000000	##000000
##51BBDB	1.00	2.22	9.48	9.48
#FFFFFF	2.22	1.00	21.00	21.00
#000000	9.48	21.00	1.00	1.00
##000000	9.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A8B6DD

Deuteranopia (green-blind)

#94A8DB

Tritanopia (blue-blind)

#00C5C5

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #51bbdb;
/* rgb */ color: rgb(81, 187, 219);
/* oklch */ color: oklch(74.3% 0.107 221.0);

Tailwind

colors: {
  custom: {
    50: '#90cfe6',
    500: '#51bbdb',
    950: '#000000',
  },
}

SCSS

$custom: #51bbdb;
$custom-light: #90cfe6;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbdb",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 219
  },
  "hsl": {
    "h": 193.913,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.74285,
    "c": 0.10671,
    "h": 221
  },
  "luminance": 0.42404
}

Semantic roles & 50–950 ramp

primary

#51BBDB

secondary

#DFB5A9

accent

#663FE9

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BBDB

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

Preview Lab → · Contrast checker → · Palette generator →