#51C0DD#51C0DD

#51C0DD is a light, moderate cyan. Relative luminance 0.447; OKLCH L 75.5% C 0.108 H 218.0°. Best body text is #000000 at 9.93:1 contrast (WCAG AA passes).

Color values

HEX	#51C0DD
RGB	rgb(81, 192, 221)
HSL	hsl(192, 67%, 59%)
HSV	hsv(192, 63%, 87%)
CMYK	cmyk(63.3%, 13.1%, 0%, 13.3%)
CIE-LAB	lab(72.67, -22.84, -23.87)
CIE-LCH	lch(72.67, 33.03, 226.27°)
OKLab	oklab(75.53% -0.085 -0.0664)
OKLCH	oklch(75.53% 0.108 218)
XYZ	xyz(35.2888, 44.6653, 75.1541)
Luminance	0.4467 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C0DD #DD6E51

analogous

#51DDB4 #51C0DD #517ADD

triadic

#51C0DD #DD51C0 #C0DD51

tetradic

#51C0DD #B451DD #DD6E51 #7ADD51

square

#51C0DD #B451DD #DD6E51 #7ADD51

split-complementary

#51C0DD #DD517A #DDB451

monochromatic

#1D7D96 #27A8C9 #51C0DD #84D3E7 #B7E5F1

Accessibility & contrast

On white

2.11

#51C0DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.93

#51C0DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C0DD

9.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C0DD	#FFFFFF	#000000	##000000
##51C0DD	1.00	2.11	9.93	9.93
#FFFFFF	2.11	1.00	21.00	21.00
#000000	9.93	21.00	1.00	1.00
##000000	9.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ADBBDF

Deuteranopia (green-blind)

#99ACDD

Tritanopia (blue-blind)

#00CAC9

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #51c0dd;
/* rgb */ color: rgb(81, 192, 221);
/* oklch */ color: oklch(75.5% 0.108 218.0);

Tailwind

colors: {
  custom: {
    50: '#90d3e7',
    500: '#51c0dd',
    950: '#000000',
  },
}

SCSS

$custom: #51c0dd;
$custom-light: #90d3e7;
$custom-dark: #000000;

JSON

{
  "hex": "#51c0dd",
  "rgb": {
    "r": 81,
    "g": 192,
    "b": 221
  },
  "hsl": {
    "h": 192.429,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.7553,
    "c": 0.10786,
    "h": 218
  },
  "luminance": 0.44669
}

Semantic roles & 50–950 ramp

primary

#51C0DD

secondary

#E0B5AA

accent

#613EEA

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51C0DD

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

Preview Lab → · Contrast checker → · Palette generator →