#51C1DD#51C1DD

#51C1DD is a light, moderate cyan. Relative luminance 0.451; OKLCH L 75.8% C 0.108 H 217.1°. Best body text is #000000 at 10.02:1 contrast (WCAG AA passes).

Color values

HEX	#51C1DD
RGB	rgb(81, 193, 221)
HSL	hsl(192, 67%, 59%)
HSV	hsv(192, 63%, 87%)
CMYK	cmyk(63.3%, 12.7%, 0%, 13.3%)
CIE-LAB	lab(72.96, -23.34, -23.43)
CIE-LCH	lch(72.96, 33.07, 225.10°)
OKLab	oklab(75.76% -0.086 -0.0652)
OKLCH	oklch(75.76% 0.108 217.1)
XYZ	xyz(35.5091, 45.1060, 75.2275)
Luminance	0.4511 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C1DD #DD6D51

analogous

#51DDB3 #51C1DD #517BDD

triadic

#51C1DD #DD51C1 #C1DD51

tetradic

#51C1DD #B351DD #DD6D51 #7BDD51

square

#51C1DD #B351DD #DD6D51 #7BDD51

split-complementary

#51C1DD #DD517B #DDB351

monochromatic

#1D7E96 #27A9C9 #51C1DD #84D3E7 #B7E5F1

Accessibility & contrast

On white

2.10

#51C1DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.02

#51C1DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C1DD

10.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C1DD	#FFFFFF	#000000	##000000
##51C1DD	1.00	2.10	10.02	10.02
#FFFFFF	2.10	1.00	21.00	21.00
#000000	10.02	21.00	1.00	1.00
##000000	10.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AEBCDF

Deuteranopia (green-blind)

#9AADDD

Tritanopia (blue-blind)

#00CBCA

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #51c1dd;
/* rgb */ color: rgb(81, 193, 221);
/* oklch */ color: oklch(75.8% 0.108 217.1);

Tailwind

colors: {
  custom: {
    50: '#90d4e7',
    500: '#51c1dd',
    950: '#000000',
  },
}

SCSS

$custom: #51c1dd;
$custom-light: #90d4e7;
$custom-dark: #000000;

JSON

{
  "hex": "#51c1dd",
  "rgb": {
    "r": 81,
    "g": 193,
    "b": 221
  },
  "hsl": {
    "h": 192,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.75763,
    "c": 0.10791,
    "h": 217.1
  },
  "luminance": 0.4511
}

Semantic roles & 50–950 ramp

primary

#51C1DD

secondary

#E0B4AA

accent

#603EEA

background

#F9FDFE

surface

#F2FAFC

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C1DD

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

Preview Lab → · Contrast checker → · Palette generator →