#51C5EA#51C5EA

#51C5EA is a light, moderate cyan. Relative luminance 0.476; OKLCH L 77.2% C 0.116 H 222.5°. Best body text is #000000 at 10.52:1 contrast (WCAG AA passes).

Color values

HEX	#51C5EA
RGB	rgb(81, 197, 234)
HSL	hsl(195, 78%, 62%)
HSV	hsv(195, 65%, 92%)
CMYK	cmyk(65.4%, 15.8%, 0%, 8.2%)
CIE-LAB	lab(74.58, -21.44, -27.98)
CIE-LCH	lch(74.58, 35.25, 232.53°)
OKLab	oklab(77.22% -0.0852 -0.0781)
OKLCH	oklch(77.22% 0.116 222.5)
XYZ	xyz(38.2049, 47.6182, 85.0037)
Luminance	0.4762 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C5EA #EA7651

analogous

#51EAC3 #51C5EA #5179EA

triadic

#51C5EA #EA51C5 #C5EA51

tetradic

#51C5EA #C351EA #EA7651 #79EA51

square

#51C5EA #C351EA #EA7651 #79EA51

split-complementary

#51C5EA #EA5179 #EAC351

monochromatic

#1587AC #1BB2E2 #51C5EA #88D7F1 #BEE9F7

Accessibility & contrast

On white

2.00

#51C5EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.52

#51C5EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C5EA

10.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C5EA	#FFFFFF	#000000	##000000
##51C5EA	1.00	2.00	10.52	10.52
#FFFFFF	2.00	1.00	21.00	21.00
#000000	10.52	21.00	1.00	1.00
##000000	10.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B0C0EC

Deuteranopia (green-blind)

#9AB1EA

Tritanopia (blue-blind)

#00D1D1

Achromatopsia (no color)

#B7B7B7

Design tokens & code

CSS

--color: #51c5ea;
/* rgb */ color: rgb(81, 197, 234);
/* oklch */ color: oklch(77.2% 0.116 222.5);

Tailwind

colors: {
  custom: {
    50: '#92d6f0',
    500: '#51c5ea',
    950: '#000000',
  },
}

SCSS

$custom: #51c5ea;
$custom-light: #92d6f0;
$custom-dark: #000000;

JSON

{
  "hex": "#51c5ea",
  "rgb": {
    "r": 81,
    "g": 197,
    "b": 234
  },
  "hsl": {
    "h": 194.51,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.77217,
    "c": 0.11552,
    "h": 222.5
  },
  "luminance": 0.47622
}

Semantic roles & 50–950 ramp

primary

#51C5EA

secondary

#E8BDAF

accent

#3D0BDB

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C5EA

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

Preview Lab → · Contrast checker → · Palette generator →