#51C0DB#51C0DB

#51C0DB is a light, moderate cyan. Relative luminance 0.446; OKLCH L 75.5% C 0.107 H 216.6°. Best body text is #000000 at 9.91:1 contrast (WCAG AA passes).

Color values

HEX	#51C0DB
RGB	rgb(81, 192, 219)
HSL	hsl(192, 66%, 59%)
HSV	hsv(192, 63%, 86%)
CMYK	cmyk(63%, 12.3%, 0%, 14.1%)
CIE-LAB	lab(72.60, -23.44, -22.89)
CIE-LCH	lch(72.60, 32.76, 224.32°)
OKLab	oklab(75.45% -0.0858 -0.0636)
OKLCH	oklch(75.45% 0.107 216.6)
XYZ	xyz(35.0239, 44.5594, 73.7591)
Luminance	0.4456 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C0DB #DB6C51

analogous

#51DBB1 #51C0DB #517BDB

triadic

#51C0DB #DB51C0 #C0DB51

tetradic

#51C0DB #B151DB #DB6C51 #7BDB51

square

#51C0DB #B151DB #DB6C51 #7BDB51

split-complementary

#51C0DB #DB517B #DBB151

monochromatic

#1E7C93 #29A7C6 #51C0DB #84D2E5 #B6E5F0

Accessibility & contrast

On white

2.12

#51C0DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.91

#51C0DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C0DB

9.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C0DB	#FFFFFF	#000000	##000000
##51C0DB	1.00	2.12	9.91	9.91
#FFFFFF	2.12	1.00	21.00	21.00
#000000	9.91	21.00	1.00	1.00
##000000	9.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AEBBDD

Deuteranopia (green-blind)

#9AACDB

Tritanopia (blue-blind)

#00CAC8

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #51c0db;
/* rgb */ color: rgb(81, 192, 219);
/* oklch */ color: oklch(75.5% 0.107 216.6);

Tailwind

colors: {
  custom: {
    50: '#90d3e6',
    500: '#51c0db',
    950: '#000000',
  },
}

SCSS

$custom: #51c0db;
$custom-light: #90d3e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51c0db",
  "rgb": {
    "r": 81,
    "g": 192,
    "b": 219
  },
  "hsl": {
    "h": 191.739,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.75451,
    "c": 0.10679,
    "h": 216.6
  },
  "luminance": 0.44563
}

Semantic roles & 50–950 ramp

primary

#51C0DB

secondary

#DFB3A9

accent

#603FE9

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1415

muted

#7E8284

Preview Lab

Preview with #51C0DB

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

Preview Lab → · Contrast checker → · Palette generator →